[QUOTE=CDan;2145715]If you’re in the USA:
Get yourself a “tray F” off of eBay, it will also come with instructions.[/QUOTE]
To go directly to the MP610 instructions
Even though they state they are for the mp600, they are the same for the MP610.
The links provided which allegedly give instructions to make a USA Canon printer print CDs and DVDs are old and do not include instructions for removing the now solid plastic “Wall”
You have to pull down the plastic door and then pop off the wall with a screwdriver. I was a little uncomfortable doing this at first because you actually have to snap off the piece of plastic holding the wall down. By default all the MP610’s were made without the wall, and then they were added as a deterrent to all the USA Models. It comes right off with a screwdriver.
Make sure to follow the instructions step by step when you put the printer into service mode and change the EPROM settings. After that change the registry keys as stated, pop in the F tray you bought on ebay, and you’re done.