Humm, what about export to an .m3u file? Those can be imported in SSL as a crate :) Also, you might want to get into contact with nik39 on the SSL forums. He made a PC only program similar to MixList, and also made another great program called ScratchTools, which can make crates automatically from folders on your hard drive, and a whole bunch of other cool stuff with the SSL library. I'm sure he knows a lot about the crate file format, if it's a matter of not knowing how to make the crate file format.