When you say you have "a little skip" what does that mean?? If they are recorded as PCM on a Hi-MD the only way you will be able to transfer them, digitally, is through the MZ-RH1. I know of no other way other than analog. That can be good if you set it up right. The RH1 can upload any disc, including legacy ones so long as there is no DRM on them.
Merde alors! Vous etes en France> OK, try minidisc.org. There are some folks there in France and Germany who will be able to help you more easily than anyone here stateside. Tant pis; et bon chance.