This works. However, if you have to use an external Apple SuperDrive with your Mac because the internal one is dead (my situation) you probably used this command line to set it up:
sudo nvram boot-args="mbasd=1"
The Parallels fix will override the boot argument, so your SuperDrive will not work anymore. Instead, you'll want to run the command like this:
sudo nvram boot-args="debug=0xd4e mbasd=1"
That will enter both boot arguments and you shouldn't have a problem. Thought I'd share it with you guys if you have a similar situation to mine.