I think one of the main reasons against episode files is they can be confusing for new users, when after unzipping the 4th (or whatever the limit is) level pack with a j2e file inside JJ2 starts crashing on the episode screen. It's probably good enough to *sensibly* use the home-cooked level list (i.e. have only the first level of your episode appear in it, name that file according to 8.3 conventions and give it a good name so people know what it is).