> You've pretty much got it, except to disregard the 'Scanner_LastFixDatFile'


Will do some brainstorming later at home.


> No slower than the 'Decompress and check SHA1' though, right? :)

It won't be slower.
hmmm...in fact if I can combine the checks.... Like a preselection of valid roms by a quick crc32 compare and if that one matches, you can optionally test the sha1/md5 value as well....So decompression and hashcalculation can be decreased to the files which most likely match a datfile entry.


Roman Scherzer