1st of all, thanks for the Loader.
Now to subject matter. Moving from v4.9x to v5.0x is really a pain. With v5.0a I have to manually re-edit all the character mods I have, cos the hair and background won't load. I have to manually add them to the corresponding code.txt. However, at least v5.0a is rather "blank line proof".
With v5.0b I have to re-edit all of them again, removing all changes for v5.0a. What surprise me is v5.0b is much more "blank line prone" than any of the previous versions. All txt files, except for Dialogue.txt, cannot have any blank lines or it'll break the chain. In my experience, previous versions, barring v5.0a which are "blank line proof", only mod.txt have to be "blank line free".
What's more, in v5.0b the order of mods listed in mods.txt also matter, which are not in any previous versions. Any mods which are original/official version compatible cannot be at the last line of mods.txt, or again the loading chain is broken. A safe bet is moving them to be the 1st listed in mods.txt.
I really hope that if this is a bug, it'll be fixed in the next iteration. If it's not, or cannot be fixed cos Flash scripting limitation, at least mention them somewhere in the included guide.
BTW, don't know if it's intentional, but loadCodeLast is set to 1 at default in v5.0b, which raises a whole lot different mess. Add the blank lines trouble to it, I've spent hours scratching my head what went wrong, cos the guide, apart from telling what loadCodeLast is, doesn't help at all.