There's a Sony DVD Changer CCF that I have listed in the Classic Pronto files section (search for downloads by me). If you also download SuperNudelist, there is a Hooks.ccf I provide that has the sequences for using Sony Changers.

The only thing you will need to know is whether you have Layer/Bitrate active. Based on the answer to this question, you will select one of 2 'After Disc' IR code sequences.

I don't recommend putting music CDs in one of these units as there's no Discrete IR code for Disc Selection and track selection is less than acceptable (lack of discrete track IR code like on the older CD changers) for the Sony DVD changers.