Well I've done several searches here and can't see an obvious answer..
I downloaded a couple of things from detonation films (a couple of free muzzle flashes)
But these are in 29.95fps NTSC and I have been told that to get this to composite with the footage I have, I need it in PAL to match the stuff I already have. which was shot as PAL footage... (The lead singer mimes a gunshot with his finger, and I thought it would be cool to make it really fire!)
I only have Premier Elements 3, so I hope there is either some trick or a plugin or even a 3rd party utility that can sort me out.