The current version (v2006) can't do this. However, we are just wrapping up the beta of a special 2008 version that's been written pretty much from scratch to operate on the Vista platform (as well as previous versions of Windows). It may be able to do this. If you're interested in trying it let me know. If you can tell me what kind of study you would be running, I can approximate how safe it would be for that purpose.