Yes, m'lord, I really hope this will help you with your own server. Just be aware that the same limits still apply as with the original idea: you can't have anything in the main script assembly that depends on something loaded in a later one. So, any script package that is completely self-contained (except for inheriting from objects from the main assembly) can be put completely into a Scripts.LV1-5 folder.
Practical example: I have Nerun's distro installed (who hasn't
). This includes a GMHidingStone, the one from CEO IIRC. I had gotten a newer version of that, and this was among the scripts I put into the LV1 folder for a test. Of course, when RunUO tried to compile the main assembly, it error'd out - because it depended on an object that would only be included in a later assembly. As long as you're sure that doesn't happen, you're golden.
Oh, and so far it's limited to five custom folders, but that should be sufficient for most servers, I guess.