Greetings. My alias is still Sparrowhawk, and I'm still a newbie.
I really did plan to stick with it, but that accursed Star Wars Galaxies took hold of me. I don't think I can shed the shackles of this demon soon enough. At any rate, when I finally do, you can count on me having all in the nature of inane questions for you to answer. Positively maddening hijinks are sure to ensue.
As for your question, Hopsing.... (Hopsing? Does "Bonanza" mean anything to you, perchance?)
I still think the reigning king of Jedi Outcast/Jedi Academy tutorials would be RichDiesel's unfinished series. They are most certainly dated, but are still a true classic and nearly a rite of passage now. I would reccomend skipping out on the editing tool he reccomends and going right to GTK-Radiant. The interface and a few of the commands are a bit different on each, but the same basic principles apply. When the questions do arise, the boards of Massassi, map-center.com, and LucasFiles should be helpful enough.
And now for links:
GTK-Radiant home-
http://www.qeradiant.com/
There's still a few problems here and there with GTK and its treatment of JO/JA- I'd peruse the boards a bit and find out which version most JO/JA editors prefer at present, as some are more stable.
RichDiesel's Tutorials-
http://richdiesal.jedioutcastmaps.com/tutorials/
This is the best I can find right now- If anybody's got a non-archived link, feel free to post it, or I'll try to make a mirror/download or something; I know I've got the files on a CD somewhere.
And some Others-
http://www.planetquake.com/qworkshop3/tutorials/
http://www.planetquake.com/bubba/mapping.html
http://map-review.com/index.php?page=tutorials
http://www.geocities.com/kengomaps/tutorials.html
Hope that helps you out, and even more hope that I did the cursed links right.