HL2 via Parallels

i had HL2 on pc, and decided to run parallels and play it via there. Has anybody managed to get this to work? Its installed fine and updated sweet but just wont start.

Sometimes it pops up with an error message saying that the registry is in use by anothe program when its not :bomb:

Parallels doesn't support 3D rendering so I would highly doubt that it would run at any sort of acceptable level (if at all). It should run fine under Bootamp