Yes you can load SMF`s into the internal 4 megs with the IDES software that comes on the CD.The 200 songs listed is a joke because some pre-loaded user files take up some space already. I have about 10 loaded on my 3200 and more on my SM Card which holds 64megs. To me its a better feature than the limited floppy drive on the 3700?
The software will take any .mid file smf0 or above and convert it to the the boards liking which is SMF0. Try that out!