Hi Guruprasad,
Did you look at the Admin guide. We are on BI 4.1 SP2 and the admin guide has got a section called "Copying your BI Platform Deployment" which talks about different scenarios of system copying.
The BI 4.0 SP10 Admin guide (http://help.sap.com/businessobject/product_guides/boexir4/en/xi4sp10_bip_admin_en.pdf) has a section called 13.1 Overview of System copying.
Cheers
Mohan