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My method is thus:
As far as each user's personal storage, that can be done by mapping to \\SERVER\SHARE\%username% - the %username% variable fills in with the user's SAM.
If you're feeling adventurous, you can use Kixtart and scripting logic to create one logon script that parses the user's groups and assign drive mappings based on that. For large companies I've seen it used preferentially due to the enormous upkeep required for having dozens of logon scripts otherwise.