Cleaning an infected hard drive with 2nd party computer

I am trying to fix a friends computer that has been infected with a virus that has her frozen out of many programs in her computer. I want to clean her hard drive with my Drive Erase CD software that I have then reinstall a copy of XP. But her disk drive is not working. So I want to use my computer connected to her computer with a USB cable and run the software on my coputer but pass the data to her computer. I think I know how to do this but I do not want to take a chance in messing up my computer if I can help it. I have all files backed up from my computer. How should I proceed from here?