Ok, ive worked out most of the errors now, got 67 missing roms, had 160 missing yesterday ! :)
But ive gotten a new problem somehow, cant say ive noticed it earlier;

Area 51 (Nov 15, 1995) [folder: area51]
wrong chd sha1: area51.chd [wrong: no SHA1 set | better convert chd to new standard] [right: 9ea749404c9a5d44f407cdb8803293ec0d61410d]


I get that error on all 4 area51 zips/folders, whats up with that ?

And a somewhat related question (?) : What are all those folders good for ? I have like 4900 zip files and about 30 folders with a single (not zip) file in them, chd or something, can i zip those folders to a zip file with the same name and still get it verified by clrmame ?