@Lyle_JP
But the MAME files have a well defined and unique filename, as far as I know. So hashing would not be needed. You could say the filename itself is the hash.
@BuZz
Oh, thanks for the info!
Seems like this is just a bad time for scraping MAME. I am hoping that it is getting better soon! Summoning Sselph for the rescue! ;)