Have you got Vista on your machine?
If so, the path will be:
C:\Users\MyUser\AppData\Roaming\Microsoft\MSEnvShared\AddIns\
Hope it helps.
I have windows server 2003.
Just checking... the Application Data folder is usually a hidden file. Have you changed your Windows Explorer to show Hidden Files under Options?
but no folder MSEnvShared in C:\Documents and Settings\All Users\Application Data\Microsoft\
just "Office" one. Is it normal ?