And for that you will need to install Sony Sonic Stage and grab HiMDRenderer (google).
-HiMDRenderer to convert the files to OMA or WAV -SS to play the OMAs (but you can add the OMA ext. to Winamp's Directshow decoder since SS installs a DS filter).
Oops. I didn't mean hacked, I meant just portioned off and distributed as the codec only. I don't mind installing the odd codec, but a whole piece of bloatware is annoying (ie Real sucks, Real Alternative is great).