drums and such
I'm sorry to say I have the 1600 and have never been able to figure out live drums. I have been in contact with BOSS as well, and I think it just can't be done, which, I know, is pretty silly.
On the up side, record your track with just a basic scratch drum track or loop as a metronome, and you can then go back later and program a sequence of patterns. It will take an afternoon to get adept at it, but then it's a snap. You'll be able to do a song in half an hour or so once you know which patterns/fills you want.
Other option: I know you probably don't want to go this route, but drum machines are way cheaper than they used to be, even if you record with basic patterns and use the machine for the odd cymbal flourish.
Sorry if this is not what you wanted to hear. If you find out anything different, please zap me a message.
Peace.
Blooby