Some very good suggestions but seriously, if you want an easy and cheap mod consider painting the front fascias of your drives (floppy, zip, CDROM).
Most people suggest using vinyl dye but I?ve found normal car spray point works fine. All you have to do is take the fronts off the drives (easy as they are only attached via clips) and then spray paint them any colour you want using very fine coats.
Do a search in the case and cooling forum for paint and you?ll find loads of info.