There’s a download a trial of the software from the bottom of this web-page and you need to install a Windows operating system to use it:http://www.parallels.com/en/products/desktop/
Here’s a review of the pros and cons:http://www.macworld.com/2006/06/reviews/parallels/index.php
If you have an older Mac processor, Virtual PC is an emulator that has been tested many times with GenoPro. Virtual PC used to be sold by Apple and Microsoft, and now it is free. You can download Virtual PC from Microsoft at http://www.microsoft.com/windows/products/winfamily/virtualpc/default.mspx