Did you select some images for texturing? How big model do you want to texture (500 bytes of storage for each triangle, or 1kb every 2 tris, or 1mb every 2000 tris, or 1 gb every 2 million tris, or 1tb every 2billion tris)?
Is is possible, that the model is created from not good aligned images, as you wrote, that it is from different stages?