That something is called Windows. If he's installing Parallels (or any of the other virtualization programs) you won't be able to run sims. The sims require Windows to talk directly to the graphics hardware, which can't happen with virtualization--yet.

Ken, it's not likely to be an emulator. Virtualization is different than emulation in that it's actually using the hardware, rather than emulating it.

Minn, have him install Bootcamp along with whatever else he's putting on. Bootcamp is free from Apple, and allows you to boot directly into Windows. That'll let you run the natively. You've already got a license for Windows if you're going to put on Parallels, so it's not a problem to also use that through Bootcamp.

If you are working through Parallels, have your IT guy make a copy of your Parallels drive image once he's done getting it configured. When you have problems with Windows (and you will), just copy your work out of the drive image, replace the drive image with the copy, and copy your work back. That's a 5 minute process, and it'll save you the hassle of troubleshooting or waiting for help.