Installation: Put item file on gta3.img or modloader (your choice)

Add-On:
weapon.dat
$ DYNAMITE_BOMB		PROJECTILE	30.0 40.0	ID	-1		8	grenade		1	 50		0.0   0.0   0.0		1  0	1.0	 1.0	 0 99  6	 0 99  8  99	100	
default.ide
ID, dynamite2, dynamite2, grenade, 1, 100, 0
gtasa_weapon_config.dat
ID   DYNAMITE_BOMB                       -1         1                          0                       8                       27   89    130  1.0            GRENADE
amutext:
DYNAMIT Dynamite Bomb
ammun.dat
ID	DYNAMIT	0		3			0			200		5		111111
Replace:
$ GRENADE		PROJECTILE	30.0 40.0	342	-1		8	grenade		1	 50		0.0   0.0   0.0		1  0	1.0	 1.0	 0 99  6	 0 99  8  99	100	