Well look at this! I went ahead and started playing Left 4 Dead 2 again. One thing I noticed, was that my original Nick's Fixed Hands skin was a little... dated. It also didn't work very well on higher detail levels.
So, I went ahead and improved it a bit!
Q/A
**Q:** What's new in this final version?
**A:** I've vastly improved the texture, and also edited the alpha channels in the normal map so that it works properly on higher detail levels. I also darkened the skin color a bit, because they seemed a bit too white.
**Q:** What was wrong with Nick's hands in the first place?
**A:** For some reason, nothing was right on his texture. As you can see in the "before" screenshots, Nick's hands used to have this annoying tan-line(?) that made no sense, and the texture also didn't wrap properly around the model.
**Q:** Why's this the final version?
**A:** At this point, I think I've done all I can do to get the texture where it looks decent enough.
**Q: **Can I use this with reskins of Nick?
**A:** No. Not unless you add the hand texture and the alpha channel to the reskin of your choice yourself.
**Q:** Am I allowed to do that?
**A:** You are allowed to use the texture on any reskin of Nick that you want, but you **do not** have my permission to **redistribute** it.