ok, go to your vc/ini/weap and search for the line:
`a_ammotype 2 0 12 // 40mm grenade ----------------m79
change that into
`a_ammotype 2 0 1000000 // 40mm grenade ----------------m79
now, scroll down to the M79 and search for this line:
`w_magazine 0 2 1 3.90
change it into:
`w_magazine 1 2 10000 3.90
have fun!