A sugestion if you want: try to add a cvar for loose and for bonus frags xD
Code:
if(get_user_team(killer)!= get_user_team(victim))
{
fm_set_user_frags(killer,get_user_frags(killer) + 1)
}else{
fm_set_user_frags(killer,get_user_frags(killer) - 1)
}
like this: sw_fragbonus - 2 xD