In my recent experience an infinite loading screen is due to having installed too many texture mods. I have the same problem and am now choosing the mods I like the most. You could test it yourself, uninstall another texture mod and install this one again.
I realize this is an old post, but here's a tutorial on how to combine texture mods to avoid the limit CD Projekt Red put on texture mods for whatever reason: http://forums.cdprojektred.com/threads/60760-Limit-of-texture-mods?p=1952871&viewfull=1#post1952871
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