Sorry I must be a bit slow but what issues might more ram in the empegs fix?

12Mb - can run v3 players. 16Mb - can run debug v3 players, or have a Kanji font, or have more caching so the disk doesn't spin up so often. More than that - can run debug v3 players with a Kanji font, or just have lots more caching. And the more files there are on the player, the bigger the database is, and the more memory it takes up (at the expense of caching).

Peter