Does anybody know if I can use my SCSI 100MB ZIP-drive with S1100 using software update ver. 2.0???

I had a search online and it seems that the S1100 will work with a SCSI Zip drive. The only limitation according to a user at Harmony Central is that you only get a maximum of 60MB on a disk whether you have a 100MB or 250MB drive. But the good news is that it should work for you.
http://www.harmony-central.com/Synth/Data/Akai/S1100-01.html