You can't because the /root directory isn't accessible by a user.
As root go into /root and do a 'copy -r .transgaming /home/user/' then as 'user' got into ~/.transgaming/ and edit 'config' so that the C:\ drive section points to /home/user/.transgaming/c_drive.
Finally create a desktop shortcut in your favourite desktop environment shortcut that 'winex3 "C://Program Files//Maxis// Sim City 4// SimCity 4.exe"'
Alternatively you could have the fake c drive in a location that isnt a user's home drive eg /mnt/games or /mount/crap etc. this would be better if you want to run winex as different users.
Additionally you shouldn't really put stuff like fake c drives is /root, I dunno why, I suppose because the superuser is only for sysadmin tasks and hence shouldn't really have much, if any, miscellaneous stuff in their home.
I suppose you didn't do it intentionally though, you will just have installled/copiled winex as root.
Anyways, good luck man.
