INSTALLATION:

paste the materials folder in your cstrike folda located 
C:/>program files>steam>steamapps>(your account)>counter strike source>cstrike

Uninstallation:

delete the file rif_famas that is about 683 kb located in
C:/>program files>steam>steamapps>(your account)>counter strike source>cstrike>materials>models>weapons>v_models>rif_famas


Credits:
myself (alexi8)

thanx 4 dl-ing mah skin (keep in mind its my 1st)