I'm in the initial stages of migrating from my older computer, which ran Vista Pro 32-bit, to a new custom rig from Cyberpower with Windows 7 installed. (So far, the computer seems great and fast: new AMD Phenom x4 II 965, 8-gigs RAM, nVidia GTX 275 graphics card, 1TB hard drive, and a motherboard equipped with the latest ports -- USB 3.0 and SATA3.)
I REALLY didn't want to do a step by step reinstall of everything on my system, so I did a search and found PCmover from Laplink. I'd owned Laplink products in the early days when I needed to sync or trade files between my notebook and my desktop. But this program not only moves preferences and settings for Windows, but also moves programs and data. No proble going from a 32-bit environment to a 64-bit. The process has taken several days, but nothing like the 2-3 months it took me to reinstall all my software, etc. when I did a clean install of Vista 2-years ago. So far, most apps seem to work. Lightroom booted up instantly, bringlin up the last catalog of images I had worked on. Photoshop CS4stumbled a little. It started up, but then rendered a 147:20 error message code -- whatever that means, so I'll probably have to reinstall it. No problem with Acrobat (which is usually horrible). I believe it has to do with the automated licensing service that starts up. I had to install an updated antivirus, and reenter a couple of program serial numbers, but otherwise, it's been comparatively effortless. The one thing that is obviously also needed are updated, 64-bit drivers for printers, etc.
I highly recommend the prgram to anyone who wants to make the 32-bit to 64-bit move.
Nemo