Hey rfm!
I got the same problem - I bought Apacer au822 and was shocked while reading manual. 99 files! gosh. It's even less then mp3 cd can hold. So I atacked google and found the solution - update your firmware. You can find it in this forum I think the interface is improved abit, but the main thing - there is no limit for folders and you can hold as many files at it fits.
I'm now working on that thingy with Turkish simbols on menu, because I want them damn English (or Lithuanian). All other menus and submenus are english, but main menu has that turkish captions for music, radio and so on.
here is the link for F/W -
http://www.mympxplayer.org/apacer-au...-pm-df427.html
(there will be download button)
You installed your mp3 utilities from cd, then go to that folder>RDiskUtility>and launch the program. Else will be clear.