As you all know, JJ2's method of loading custom SP levels is critically flawed. And there has got to be something better than JCS -> File -> Save & Run. I may look like an idiot for asking, but suggestions?

There's always this article--I added a comment on how to do it for XP somewhere in the middle of the page. Now that I've seen the article again, it could be better, but I guess it's good enough.

There's also Captain Cook v1.2, which is pretty good. If only it had the features of this add-on for mIRC...

The mIRC add-on is a great solution. I forgot about that because I was unable to use IRC on my old computer.