moving Temporary Internet Files Folder location

I'm trying to permanently move the location of the a user's Temporary
Internet Files Folder from the Z ramdrive to the C drive so I can store a
cookie on the C drive. I've changed the drive letters from for the Cache,
Cookies, & History from Z to C in the following registry keys:

HKU\(userid)\Software\Microsoft\Windows\CurrentVer sion\Explorer\Shell Folder\
&
HKU\(userid)\Software\Microsoft\Windows\CurrentVer sion\Explorer\User Shell
Folder\

However, everytime I reboot the userid folder goes right back to Z. I've
tried it with the EWF enabled & disabled.

Any ideas of where else I may need to make changes?

Thanks!