I've been working on the lore for an original campaign, that I'm planning to make with the D:OS2 Editor. There are already 15+ Word pages of written material and a handcrafted map I've painted with some freeware painting program.
Sounds like a lot of work. I would highly recommend working on that short mod, it will give you a much better idea of what's possible.
I'm always willing to help out on D:OS editor questions so if you get rolling and run into problems post them on the board.
Hopefully the D:OS 2 editor is easier, and if that's the case your experience in the EE editor will make you a relative pro :P