Kon - As Doug says, use VMware's Fusion4. Install it, give it a largish partition and install Windows as normal within the virtual partition. Then run your PHD app within that while still inside the Mac OS. I run this setup on my late 2011 MacBook Air and it's fantastic. I then run the full version of SkySafari for Mac along side - and all at the same time. A thread was running here:
http://www.iceinspace.com.au/forum/s...ad.php?t=59189