Like adicoto said I think that nobody here knows the solution to your problem, and that's why you didn't received an answer.
If you want to monitor your registry accesses (read, write, open keys, etc.) you can use RegMon (
www.sysinternals.com )
The Enhancer problem is strange.. since v1.40 (or maybe a couple of build before) the enhancer windows pop-up when a movie is played only if "Disable skinned windows" is not selected (ion Skins' preferences section), but it should work normally. I use it and it works.
I don't have much more to tell you. Sorry..