Perhaps it's better just to get a 32-bit version of Windows 8?

Many thanks for your sound advice. I have a only 64 bit Windows 8 CD so I need to change the CPU (with 3GB RAM).?

I have a T60 with 3Mb Ram and a T2400 cpu running at 1.83Ghz. It has Windows 7 Professional 32-bit installed. I wish to install Windows 8 64-bit and am considering changing the CPU for a T7250 from an old T61. If I do so will it still load 32 bit Windows 7 to enable the upgrade to Windows 8 64 bit a...