So, why not hooking up to this?Thing get done in CHDK because somebody wants to do them and has the skills and time to make it happen. So unless somebody volunteers to do something like this, it just won't get done. Sorry.
Should be doable.
I know, and I do not request the feature, just wanted to add because I did not see this suggestion to use the internal codec came up here, just things about how to program a mp3-decoder ..