You have to download a program called ' Opeak '
from here:
http://www.opeak.de/german/download/index.htm
You can use a 9 or 25 pin sub-D connecter
for the connection:
http://www.opeak.de/german/software/hard.htm
Unfortunately the English page is not up yet, If you need help with the manual I think I can translate it for you, just drop me an email.