I just got my wk 3700 today..

I was playing along with some smf's off the internet I was wondering do I always have to load them off of a disc or smart media or can I load smf's into the internal memory on the keyboard (says it can hold 200 files) I guess my question is it just special casio created midis that can go into internal memory or can any midi 0 off the internet go in it..

hehe and if you can do it would you mind describing how...

Thanks in advance!