walkthrough

I have a 3d of the Biblical tabernacle and have tried using the walkthrough that comes with blender - distorted to say the least - is there a better walkthrough for blender?
also need great textures - can you suggest a good site - have searched the internet…endlessly and not much seems to suit my project - Thank you very much

As for the walkthrough, I would create a path, then animate the camera to the path.
Here is a list of texture sites: http://freetexturesite.blogspot.com/