Hi im adding custom nades to my map and I got the models working great and all but now I want to play an effect where and when the grenade explodes, keep in mind that I want to preserve the default explosion effects that happen with panzer, mokeys, ect. essentially I want to play an extra effect where a grenade explodes. I would really appreciate some help thanks!

You could add the effect by script, this is how you can keep track of grenades:

wait_for_nade()
{
self endon( "death" );
 
	while(1)
	{
		self waittill( "grenade_fire", grenade, weaponName );
		self thread grenade_fired(grenade, weapname);
	}
}

grenade_fired(grenade, weapname)
{
self endon( "death" );

	while( isdefined( grenade ) )
	{
		last origin = grenade.origin;
		wait 0.1;
	}
 
	Iprintlnbold( "grenade exploded at: "+last_origin );
}