It's not impossible but it's difficult and likely not worth it, when there are easier solutions.
To summarize there are two issues with the different hardware, Windows will not boot or will BSOD because of it, and the license is likely OEM, so it will be no longer active when you move to another hardware.
The best, and easiest option is to use Parallels Transporter that will 'transport' your Windows installation with programs, files and settings to a a new VM on the Mac, if disk space isn't an issue.
Last edited: Jun 12, 2012