É so procurares um bocado que encontras, mas parece-me que é a base de extrair ficheiros para as pastas correctas...
Num instante encontrei instruções para o soccerjam:
Installation
REQUIRES AMXX 1.75!!!
Download the Plugins soccerjam.amxx and faketeambot.amxx. Open up your plugins.ini and add soccerjam.amxx and faketeambot.amxx at the bottom.
Enable the correct modules. Fun , Fakemeta , Engine , Cstrike
Next download the SoccerJamFiles.zip and unzip it's contents to your server cstrike folder. It contains the standard soccerjam.bsp map, ball model, and game sounds.
Finally, download the soccerjam.txt and soccerjam_help.txt and add them to amxmodx\data\lang , to enable the multilingual support.
Start the server and your ready.
http://forums.alliedmods.net/showthread.php?t=41447
E não te esqueças do restart ao server para o AMXX conseguir carregar os módulos e plugins 8)