32 bit -> 64 bit

[Bags]

So is there any way to switch from 32 bit to 64 bit without losing all of my files (without backing up), sort of like the option they give you to go from xp to 7? (I believe there's an option upon upgrading from xp to 7 that tries to save all of your documents but not programs obv.)

Curious as I can get win7 64 bit for $30 via school discount. Will probably get it regardless.