Check those poly counts if your getting anything from a free resource. Often the polygon counts are so high that the models are nigh on useless for games.
Typically, this is what I tend to aim at.
Characters 600-1200 polygons
Vehicles 500-2000 polygons
Furniture <100 polygons
It might be worth picking up a free modelling package and trying to reduce the polygon counts, or even make low polygon versions using the original media as a guide.
If you don't keep an eye on polygon counts, your game will quickly become too slow to be fun.
Van-B
It's c**p being the only coder in the village.