As far as I understand Wine runtime does better if some libraries are copied from MS Windows, but some Windows system libraries really are not to be used with Wine (some can even make it stop working, and many are simply useless).
So what files make sense and are safe to copy from MS Windows into Wine system?
I own a legal Windows XP copy (but prefer to use GNU/Linux) and run Wine 1.3.8 on Ubuntu 10.10.