There are high quality texture and models replacers for Shadow Warrior? Or source ports? I have the CD somewhere I would like to play it again.
There is always this port: http://www.proasm.com/sw/swp.html
And it has some higher resolution graphics in the addons.
However, I don't know if it is still being updated. I have tried it, but quite some time ago, but from what I remember it did work okay. Didn't play it that much though.
afaik proasm isn't being updated anymore, but it still works fine. (Well, I get occasional crashes and corrupt save games, so I save often in different slots, but it is playable). The highres pack is now maintained by Hendricks and is occasionally being updated: