Hello,
If you have backed up individual documents, you can restore them without the need to restore the entire Sharepoint portal server.
You can also redirect a Sharepoint portal server restore.
For more information on this, refer to chapter P on page 1395 in the admin manual. Here is the link to download it:
VERITAS Backup Exec (tm) 10.0 for Windows Servers Administrator's Guide (English)
http://support.veritas.com/docs/269777
In case you have more queries on this, revert with details.
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Regards.