The also makes no difference. With a regex you can match what you want, but if you can influence the material, you either can adjust the regex on everey new file or search for filenames that could match. Option 1 isn't really usefull, if you have to open aMule for this, you can just switch to the right category and leave the rest as it is. Option 2 means, that you have to have your regex on mind when you get a file, and if you found a file that doesn't match search on, or return to option one. So no really advantage here.