Hello everyone.
For dangerous city for 1.2 try these code
<config>
<append xpath="/spawning/biome[@name='pine_forest']">
<spawn id="my_spawn_pine_day" maxcount="1" respawndelay="1" time="Day" entitygroup="ZombiesAll" tags="wilderness"/>
<spawn id="my_spawn_pine_night" maxcount="1" respawndelay="1" time="Night" entitygroup="ZombiesNight" tags="wilderness"/>
<spawn id="my_spawn_pine_com_day" maxcount="5" respawndelay="0.3" time="Day" entitygroup="ZombiesAll" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_pine_com_night" maxcount="5" respawndelay="0.15" time="Night" entitygroup="ZombiesNight" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_pine_res_day" maxcount="3" respawndelay="2" time="Day" entitygroup="ZombiesAll" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_pine_res_night" maxcount="3" respawndelay="2" time="Night" entitygroup="ZombiesNight" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_pine_downtown_day" maxcount="6" respawndelay="0.3" time="Day" entitygroup="ZombiesForestDowntown" tags="downtown"/>
<spawn id="my_spawn_pine_downtown_night" maxcount="6" respawndelay="0.1" time="Night" entitygroup="ZombiesForestDowntownNight" tags="downtown"/>
<spawn id="my_spawn_pine_game_any" maxcount="1" respawndelay="1" time="Any" entitygroup="WildGameForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
<spawn id="my_spawn_pine_enemy_night" maxcount="1" respawndelay="1.1" time="Night" entitygroup="EnemyAnimalsForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
</append>
<append xpath="/spawning/biome[@name='burnt_forest']">
<spawn id="my_spawn_burnt_day" maxcount="1" respawndelay="0.5" time="Day" entitygroup="ZombiesBurntForest" tags="wilderness"/>
<spawn id="my_spawn_burnt_night" maxcount="1" respawndelay="0.5" time="Night" entitygroup="ZombiesNight" tags="wilderness"/>
<spawn id="my_spawn_burnt_com_day" maxcount="5" respawndelay="0.25" time="Day" entitygroup="ZombiesBurntForest" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_burnt_com_night" maxcount="5" respawndelay="0.15" time="Night" entitygroup="ZombiesNight" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_burnt_res_day" maxcount="3" respawndelay="2" time="Day" entitygroup="ZombiesAll" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_burnt_res_night" maxcount="3" respawndelay="2" time="Night" entitygroup="ZombiesNight" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_burnt_downtown_day" maxcount="6" respawndelay="0.15" time="Day" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_burnt_downtown_night" maxcount="6" respawndelay="0.1" time="Night" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_burnt_game_any" maxcount="1" respawndelay="1" time="Any" entitygroup="WildGameForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
<spawn id="my_spawn_burnt_enemy_night" maxcount="1" respawndelay="1.1" time="Night" entitygroup="EnemyAnimalsForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
</append>
<append xpath="/spawning/biome[@name='desert']">
<spawn id="my_spawn_desert_day" maxcount="1" respawndelay="0.5" time="Day" entitygroup="ZombiesAll" tags="wilderness"/>
<spawn id="my_spawn_desert_night" maxcount="1" respawndelay="0.5" time="Night" entitygroup="ZombiesNight" tags="wilderness"/>
<spawn id="my_spawn_desert_com_day" maxcount="5" respawndelay="0.2" time="Day" entitygroup="ZombiesAll" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_desert_com_night" maxcount="5" respawndelay="0.1" time="Night" entitygroup="ZombiesNight" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_desert_res_day" maxcount="3" respawndelay="2" time="Day" entitygroup="ZombiesAll" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_desert_res_night" maxcount="3" respawndelay="2" time="Night" entitygroup="ZombiesNight" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_desert_downtown_day" maxcount="6" respawndelay="0.2" time="Day" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_desert_downtown_night" maxcount="6" respawndelay="0.09" time="Night" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_desert_game_any" maxcount="1" respawndelay="1" time="Any" entitygroup="WildGameForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
<spawn id="my_spawn_desert_enemy_night" maxcount="1" respawndelay="1.1" time="Night" entitygroup="EnemyAnimalsDesert" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
</append>
<append xpath="/spawning/biome[@name='snow']">
<spawn id="my_spawn_snow_day" maxcount="1" respawndelay="0.5" time="Day" entitygroup="SnowZombies" tags="wilderness"/>
<spawn id="my_spawn_snow_night" maxcount="1" respawndelay="0.5" time="Night" entitygroup="ZombiesNight" tags="wilderness"/>
<spawn id="my_spawn_snow_com_day" maxcount="5" respawndelay="0.09" time="Day" entitygroup="SnowZombies" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_snow_com_night" maxcount="5" respawndelay="0.06" time="Night" entitygroup="ZombiesNight" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_snow_res_day" maxcount="3" respawndelay="2" time="Day" entitygroup="ZombiesAll" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_snow_res_night" maxcount="3" respawndelay="2" time="Night" entitygroup="ZombiesNight" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_snow_downtown_day" maxcount="6" respawndelay="0.07" time="Day" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_snow_downtown_night" maxcount="6" respawndelay="0.04" time="Night" entitygroup="ZombiesDowntown" tags="downtown"/>
<spawn id="my_spawn_snow_game_any" maxcount="1" respawndelay="1" time="Any" entitygroup="WildGameForest" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
<spawn id="my_spawn_snow_enemy_night" maxcount="1" respawndelay="1.1" time="Night" entitygroup="EnemyAnimalsSnow" spawnDeadChance="0" notags="commercial,industrial,downtown,countryresidential,countrytown,residential,rural,gateway,oldwest"/>
</append>
<append xpath="/spawning/biome[@name='wasteland']">
<spawn id="my_spawn_waste_day" maxcount="1" respawndelay="0.25" time="Day" entitygroup="ZombiesWasteland" tags="wilderness"/>
<spawn id="my_spawn_waste_night" maxcount="1" respawndelay="0.25" time="Night" entitygroup="ZombiesWastelandNight" tags="wilderness"/>
<spawn id="my_spawn_waste_com_day" maxcount="8" respawndelay="0.033" time="Day" entitygroup="ZombiesWasteland" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_waste_com_night" maxcount="8" respawndelay="0.002" time="Night" entitygroup="ZombiesWastelandNight" tags="commercial,industrial" notags="downtown"/>
<spawn id="my_spawn_waste_res_day" maxcount="4" respawndelay="0.05" time="Day" entitygroup="ZombiesWasteland" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_waste_res_night" maxcount="4" respawndelay="0.025" time="Night" entitygroup="ZombiesWastelandNight" tags="residential,rural,gateway,countryresidential,countrytown,oldwest"/>
<spawn id="my_spawn_waste_downtown_day" maxcount="8" respawndelay="0.0167" time="Day" entitygroup="ZombiesWastelandDowntown" tags="downtown"/>
<spawn id="my_spawn_waste_downtown_night" maxcount="8" respawndelay="0.002" time="Night" entitygroup="ZombiesWastelandDowntown" tags="downtown"/>
<spawn id="my_spawn_waste_enemy_any" maxcount="1" respawndelay="0.3" time="Any" entitygroup="EnemyAnimalsWasteland" spawnDeadChance="0"/>
</append>
</config>