> For example: I have all the roms for the clone "mspacmab" but not the uniqe roms
> for the parent "mspacman". If I let clrmame rebuild the sets I will get the
> clone zip (mspacmab.zip) but not the parent zip (mspacman.zip) with the common
> roms.

If you miss the real parent roms, the rebuilder won't create them of course. Split sets means that the clones only got the cloneroms in them and parentsets only got the parentroms. Clones in split sets aren't playable if kept alone. I guess you want something like not-merged sets...which is a big waste of diskspace.

> windows in my cabinet. Is it possible to run clrmamepro without a mouse?

You can use the standard windows key navigation. Tab, cursorkeys, space, enter, escape and the alt-shortcuts to enable/disable buttons.