Replacing Audio Streams in multi-angle blu-rays while keeping menus and structure intact. Possible?

Hi I'm working on a small project for myself and some of my friends we basically want to try and replace two audio streams in the star wars prequel blu ray set while keeping the menu's intact.

This blu ray it seems uses bd-j and multiple angles. I was attempting to reauthor it in multiavchd to no avail i was wondering if anyone could offer any advice or guidance on programs to use or whether or not it is even possible or if it would be better to just create my own menus. Which I can do I just wanted to attempt this way first if it is even possible with available tools.

I was not able to add subs to do the ROTS blu ray yet havent gotten that to work but i may have gotten phantom menace to work with rifftrax by just replacing one of the ac3 commentaries, i tested the blu ray on a ps3 and was immediately presented with a red sign that insisted i need to upgrade my bd player, i think this may be some sort of copy protection bd+ any thoughts on decrypting the set for use or would i be better off just ripping to mkv and making my own multiavchd menus?