OK I am confused with the use of DATs.
I have latest ClrMAMEPro.
I load the dat, point it to the folder I already have WHDLoad zips in and scan...
Finds many uneeded and many missing sets (ok sets are normal probably as I haven't updated the set yet)... seems it is going IN the zips to look.
What am I doing wrong really?
Simpler questions: Demos and Magazines are totally new collections and nothing included in those sets is in any older WHDLoad set correct? So I am safe to download them from scratch right?