Request: Roland C-80

I know this must sound stupid, but could somebody please help me with the digital harpsichord Roland C-80 (the old type) which I am using as a piano. I know it's not meant to be used like that, but it has the key response etc. The problem is that I cannot find out any setting that would make my playing comfortable. Any suggestions as to the velocity curve and other options. By the way, I have Pianoteq7 Stage version. Thank you so much.