At both home and work I use Vista and XP resulting me typing "C:\Users" in XP and "C:\Documents and Settings" in Vista which - of course - don't work. You cannot really change those paths except when you install Vista or XP with...
Till now I normally used the cacls command on the commandline for modifying ntfs file permissions. I always used the /E /T /G switches but soon found out that this does a recursive change on all folders/files and doesn't use the inheritance flag....