Yep, got the DSF installed.

I've got the old Multisamples folder (I renamed it before doing the re-install) but I can't locate any more installers.

These aren't just wav's that I can drop & drag are they - they need the installer to work properly, at least that's my (limited) understanding

No installers needed. You can merge the multisample and programs directories. That is all the installers do. Copy the wavs and sfzs into the multisample directory tree, copy the programs into the programs directory tree and (if they do a complete job) delete the programs.lst file in the programs directory. The programs.lst file is rebuilt the first time you open DimPro (or press the F5 key in the browser if you do not previous delete the programs.lst). That is how I built my new install a few months ago.

Good stuff Steve.

Thanks for bearing with me on this one.

No problem. FWIW, all the sfz engine synths work pretty much the same way. Session Drummer has a few extra directories for kits and midi loops. Rapture can have a few more pieces dropped in its ProgramData area directories. In every case that I have seen, the installers for CW sfz synths are just copying stuff, no registry entries or anything fancy.