--open sparkIV
--go to pc -> models -> cdimages -> open weapons.img
--import cj_rpg_rocket,rpg,w_bat,w_eaglek,w_grenade,w_m4,w_molotov,w_mp5,w_psg,w_shotgun (wtd and wdr)
--rebuild and save
--paste and replace WeaponInfo.xml in Grand Theft Auto IV\GTAIV\common\data to find only modified weapons and to change the maximum number of shots and the loader arms