Particle effects usually look better than any pre-rendered explosions anyway. I'd just use that. Of course, someone with lots of knowledge of movie special effects could make something better, but that's quite unnecessary if you ask me. I'm pretty good with effects if you need some help.
I guess i'll use particle effects. Do you know of any articles on 'computed particle dynamics' or something similar?
Try VeT's explosion demo in Newton. They looks great!!

True, the physics looks very good. But it's the particle effects i am after. I know there is particle effects in that demo, it's just that their not what i want.