Porting models from GTA mods? Can anyone make these work?

This link is for a DLC model from Assassin’s Creed: Revelations. However, it seems that you needs San Andreas installed for the mod to work. You have to download an exe and then the GTA files are automatically overwritten. At least, I think this is the case.

This model and more are available from the site. Does anyone know how we can access these models without GTA?