MusicallyInspired, you may be interested in pages 56, 60 and 61 of the original NJVC Custom Bluray thread. A few of us have found that VLC won’t play these particular iso files properly (essentially, it hangs on the main movie but the rest works fine).
http://originaltrilogy.com/topic/Star-Wars-Despecialized-Editions-Custom-Bluray-Set/id/49995/page/56
http://originaltrilogy.com/topic/Star-Wars-Despecialized-Editions-Custom-Bluray-Set/id/49995/page/60
http://originaltrilogy.com/topic/Star-Wars-Despecialized-Editions-Custom-Bluray-Set/id/49995/page/61
I’m not sure if anyone has found a solution other than to use alternative software, such as Leawo mentioned earlier.
Bluto