At last, a real mod for W&W! Alz was a worker at Heuristic Park. His website, curiousconstructs.com/deep6/, contains an expansion for the Crypt area.
For the link to his website, see Ironworks topic, "Editor and Mod for W & W", page 3, post #22. Look on the Grab Bag page, the relevant icon is a bag of money with a question mark on it. I can't provide the link, I only just joined here.
"Some of the current levels in the game were the first levels anyone on the team had made before. After learning the game editor, technology limits, and what makes a level exciting, I decided to remake the Crypt and Snake Temple levels.
I left the company before the game was finished and hoped DWB would use these new versions, but sadly they never made it into the final game.
Included in the file below are the raw map files, diagrams of the new levels, and screenshots. In addition to the new Crypt and Snake Temple, you'll also find smaller levels such as Gareth's House and an example for a 3D town you could walk through. With the idea of tossing the original Crypt, the backend of it would have been used for a Deathmatch arena ("DM-Sewers")"

SS-New-Levels.rar - this contains the expansion.
To use the expansion, I suppose you just drop the files into the relevant folders.

Rar files can be opened by various programs, one is the freeware 7Zip.

SS-Sketches.rar - this contains seven sketches of important characters in W&W.

I don't understand: this is for S&S or for W&W ?
On the website this is under Swords & Sorcery

Swords & Sorcery was a working name for the game before release. If you look on the "Game" page, it will show box art for Wizards & Warriors at the top, and older, unused box art for Swords & Sorcery at the bottom.

I was never able to get these files working, sadly. I think the file names & structure may have changed near release, or perhaps the files straight from the editor aren't enough. If anyone was able to get these working, I would love to see the edited maps ingame!

It would be interesting to see actual editor they used for WW.

It was all in-house tech, built from the ground up. The editor was similar to what Doom was at the time.

Hmm... I tried a new topic. Being new, it might be stuck in some que.

For any fans out there, here's my website from 1999 for Wizards & Warriors (or what it was originally called Swords & Sorcery)

http://curiousconstructs.com/deep6/

What follows are some of the maps in the game. Some of them were new versions I built and lit after I learned a ton. They were unfortunately not used because encounters had already been added on top of the first versions.