[Samba] installing software as a user

[Huck]

After joining machines to my Samba domain (in a school setting)some 
accounting software no longer functions as it needs to be run as the 
user that installed the software.

So I uninstalled the software and attempted re-install as that user, but 
was told via a pop-up error message that the user did not have rights to 
install.

The user exists on the local machine(XP Pro) and has administrative 
privileges, but apparently when logging into the domain it changes the 
user's effective rights.

Is there some simple 'user configuration' on the Samba side that I need 
to do with 'smbpasswd' or with the linux groups to allow users to 
install software?

Thanks,

--Huck