Oh, OK. I understand a little better now … I think.

People are wanting to spread the SW & ESB sets across three discs & ROTJ across four, correct?

I guess this would presumably be because they only want to have to buy one type of disc?

But yeah towne32 is right that it would be a major undertaking to rebuild those ISOs from the ground up, and way above my technical skills.

All in all, I’d say it would just be best to spring for a small pack of 50gb Verbatim dual layer blu-rays. There are packs of ten on eBay going for around $25. Then you’d even have a few spares in case of burning errors.