Do you know what they are, for example for a One-for-All remote ?
No - not a One-for-All.
I have a Universal and an RCA remote. I know that the RCA (cheaper, non-learning) only has the Pio code, but nothing listed under LG.
The (better, learning) URC-R6 has the Pio code, too, but they also list one LG satellite code. However, I don't have a Zenith/LG CECB to test it on.
Almost all remotes have the Pio code - it's a very, very old, common code, that used to even control Panasonic cable boxes. I would suggest trying all available Pio codes for that, because you're bound to have it. It will only work the basic controls, though (no menus).