I've tried the following one-for-all remotes, and if I could pick-and-choose features from each one, I'd have an acceptable remote:

ProProducer 7: (won't learn on any standard keys, not backlit, no menu layout)

Cinema 6: (won't learn one specific code from my remote, not backlit, limited to ~28 learned codes otherwise, doesn't support the 518 codeset as well as the ProProducer 7 did).

RS 15-1994 (doesn't have the 518 codeset, and has all other disadvantages of the Cinema 6 except it has a backlight).

As I understand it, the Home Producer 8 won't learn on any keys except the L keys, but does have room for 48 codes.

Does One-for-all make anything that will learn on non-L keys, has an area for menu buttons, and can learn more than ~28 codes? I realize that this still won't answer whether or not it will learn the menu-left button from my DVD player, but at least it gives me a direction to look.