bill - 4:21 am on Mar 6, 2010 (gmt 0)
I haven't run that particular version on Windows 7, but PSE 7 & 8 work fine. I don't see why it wouldn't work, however if it's a deal breaker for you then Adobe Support would be the people to ask.
Windows 7 is essentially Vista Service Pack 3. That's simplifying things a bit, but in general there isn't that much difference between them. You should be able to run software that runs on Vista on 7 in most cases.