There's no tutorial for this that I know of, it's just a workaround I figured out. All the others can be scanned in their /folder/folder.zip. Flyers are different because their size makes a zip out of the question. I don't know how to explain it better than I already did. Put flyers unzipped into mame/flyers/flyers, point clrmame to mame/flyers, scan. Dropped in flyer update packs into the clrmame window will probably be rebuilt to /flyers/flyers.zip and you'll get a warning message in clrmame. Manually move the rebuilt flyers from this zip clrmame made (unzip them into mame/flyers/flyers). Then move the contents of mame/flyers/flyers into mame/flyers and delete the empty mame/flyers/flyers dir and you should be good.