Windows 7 Install question

[TKF]

I'm dual booting now with 1 XP and 2 Vista both 32 bit I'm going to do a custom install with windows 7 64 bit (upgrade disk) using vista as my upgrade path I want to use my entire drive for 7 should I delete my xp partition first and resize my vista partition before install or after install. Or does anyone know a better way.
trying to stay legit with my install
Thanks for any suggestions

 

[KSoD]

You cant do what you want. You can't upgrade from a 32 Bit install to a 64 Bit. You will have to do a clean install. But yes just delete the partitions.

 

[dhMassacre]

You'll have to wipe all data before doing the 64 bit install as they are totally different systems.