Hello,
Please upgrade the Windows 2000 to Windows 2003 before moving to another server.
Also please refer the following technote. This is applicable for 10.0 as well..
Title:
How to uninstall and reinstall Backup Exec 9.x, or move Backup Exec 9.x to a different computer, without losing job configuration information
http://support.veritas.com/docs/260054
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