Now you need to install the programs that will let you design and print onto the disks.
Canon has a simple program, CD-LabelPrint, availible for download from it's European downloads
CD-LabelPrint is pretty restrictive as far as features go but is great as a free program. Another alternative is SureThing CD Labeler
, but alas it is not free.
The best program I found for printing disks is UnderCover XP
UnderCover XP. Best of all, the price can't be beat! If you like it, support it via paypal donation.
Finally you need to have a tray to insert into the printer. You can make it cheap, or buy it (still pretty cheap) on ebay. My tutorial for the tray is here