Maeve Gray

Could someone please tell me how to safely download winAVR so I can use it to re-program the chip on Mitch Altman's BrainMachine, without destroying my computer. Someone said use notepad, just a regular notepad? how would that affect the command prompt, where do I find that? Someone said save it to a standard drive, total hand-holding needed here, did they mean not in C\Windows\Program files, then which one? Please all of it, for a non-programmer, total newbie.