Nah

I actually want dual booting in the laptop as some softwares which run in xp cant run in vista or I want two different versions to run from my laptop for example. Office 2003 (for my office) and Office 2007 (personal use), VB6 and Visual Studio 2008 etc...

Rgd an extra harddisk, that is one option but after spending (Rs 72000 [approx $2000.00]) that seems a faraway option