I really don't know. Never saw a need to do that. I know the Ketrons can.
for example your playing a style song lets say.................
you next song is a smf/mp3 track etc song, I like to overlap at the end and start the next song without any in-between time hence why I need to segway changes in-between songs when people are dancing. I know with my PA3x KORG had the dual smf player although awkward to search, load, use live it did work to a point..