Need to take backup of Plesk 9

[SanyogS]

Hello Team

Currently i having Plesk 9.2.1 Windows Version running on my Server with 80 Domains
& i have plan for Upgrade my Windows Version 2003 to Windows Server 2008, so any one can help me with this that i can able to take complete Plesk Service backup before formatting server. & as well as restore same data once i install newly Windows 2008 Server with Plesk Service

Advance thank you