how to Not show "free space available" on mapped drives

2003 File share server is connected to SAN. When XP & Vista clients map
their drives, it is showing the properties for the entire SAN, not their
specific home folder (share). Is there a way to either not show this
property at all or hide the free space. Users think they have a lot of space
- we use SpaceGuard on our server and have a limit placed on the users
folder. It is confusing to users when they receive an email that they are
close to their limit but when they check the properties it appears that they
have a lot of free space.

Thanks!