Still working, 3/6/11. (NAGC)
There is no way to update from 32bit to 64bit safely, or for free. You could try to download a pirated version, but its illegal, and if you don't know what you're doing you risk getting in trouble with the law.
So, just buy a new Windows OS, or give up.
The hack will not work for 32bit systems. Period. No workarounds or solutions.
Sorry to anyone who can't use it.
Maybe next time ?