Mixed Miniature Battles?

[Carrion_Humanoid]

I have this question Im trying to figure out so A shop-Owner can run a competition.

About say, four days ago, me and my friend were playing with our D&D(Me) and Starwars(Him) miniatures(like the 5 year olds we 13 year olds are) and get to the point where we start to battle. We were arguing over who was winning when we figured, hey? why not do a skirmish? So we aligned all our pieces up to 500 points, and battled. When we were done, the shop-keep asked "But what about the point differance?" We thought about it and I looked it up, but to no avail.

So My question is, how can we deal with the point differance?

[Mr. Moon]

Well, first off your going to have to compinsate for the weapons and armor. Space age modles are obvioulsy going to have better armor and guns then the sword and full plate the average D&D Barbarian wears.

[Carrion_Humanoid]

Yeah, I noticed, but we have flying and breathweapons and magic and damage resistance.