Hi,
the members in this group are also helpful. http://launch.groups.yahoo.com/group/solton/

it's the keyboard/module to computer cable http://www.ketronus.com/accessories.html
This is a USA site though, you'd have to probably find one in Europe?? Make sure that it's definately a Ketron cable as a normal serial/pc cable I think is wired differently. I couldn't get my regular serial cable to work. Someone gave me the Ketron one, nowworks perfectly.
Bear in mind it's a serial cable. Does your computer have a serial port??
Some new computers only have usb ports.

The software used is Ketronft. http://www.ketron.it/software/index.asp

I'm not sure, but maybe updates can be done from floppy disk??
I haven't had to update my sd1+ as yet.

best wishes
Rikki