Vintage Simmons Drums (UK) Users Group

Finally I found it out myself and in case someone is interested :

To have both OS and Sounds/Patches on the HD, just save or copy with
FORMAT FIRST. This will make a new Disk on the HD each time you save
something. Works perfect now with my SDX 00016 (former Accept) :-)
Greetz, tph

PS. Still searching for some of the original sounddisks for the SDX
    and the appendix documentation for the XSEQ and XEDIT.
    Any help will be appreciated :-)