So my CPU only gets to 30% while 5boxing... My video card nowhere near maxed... However, my RAM is just killing me.

So I'm looking to upgrade to 8GB RAM. This obviously involves a 64bit Windows Vista.... Which leads me to my questions:



Whats the absolute cheapest/best/fastest route for upgrading Vista Ultimate 32bit to 64bit?

I only own a 32bit "System Builders" CD, will I be required to purchase a new CD?

Will it require me basically starting with a completely new OS, or can I still keep most things, like WoW, etc?