I can't help you with the keyboard controls, but maybe I can point you in the right direction.
There's a mod called "Project: X" by Richter Belmont that uses modern game controls. The source code has also been released for it, so you could use that as an example. Check the resources at the Wolf3d Dome. If it's not there, hunt it at DHW or ask Richter Belmont via PM.
Please keep in mind that many fans of Wolf3d who play the mods might not like the new fangled controls. Leaving in an option to play it the "old" way would be advisable if you want everyone to play and enjoy your mod. In fact, "Project: X" added the option to use classic controls due to popular demand (after its initial release).
Hope this helps,