Vista - itunes hangs on exiting / bad idea to "sync" itl and xml library f

At first I thought my hanging issues were the result of synching my itl and
xml library files from another pc (which on the remote pc.. i use the exact
same drive letter/folder structure as the home, base pc).. I was trying to
find an easier to way to update the changes i would make to my built in
itunes playlists on the home pc.. rather than than just reimporting m3u
versions of the playlist or manually changing things twice on each pc...

So i put back the original itl and xml files.. but every time i click exit
on itunes it just hangs.. i have to kill the task in Vista (x86, sp1).. The
problems and reports shows apphangB1.. apop version 7.6.1.9.. app time stamp
47bb3aa0, hang signature 3c5f hang type 2048...

If i connect as a different user, i have no issues exiting the program under
that id...

Any thoughts out there? Any thoughts on whether its a bad or good idea to
sync the itl / xml files or an alternative way to keep changes to playlists
on a 2nd pc in sync with the primary, short of the methods i currently use..
as of now i'm not synching the xml/itl's anymore, though i dont think this
was what is causing the hangs.

Thanks