Wizardry 5 used to be very effective at "walking into walls". Unfortunately, even with Mo'slo, with the new Pentium systems, the "walking into walls" doesn't always pull up the "OUCH" screen that it did on the slower systems (think Intel 8088 XT! The game was designed back in 1987-88). So, unfortunately, you're pretty much stuck with using online maps for the dark areas.
Wizardry I is just a period piece. It's main draw was that it was the first mainstream 1st-person oriented RPG (actually dungeon crawl); at the time, most other games (1981) were text-based only. "You enter a dimly-lit room with exits to the north, east, west, and south. Rats are running across the floor. In the corner is a rickety chest" ...those type. Playing Wizardry I is sort of like getting a "re-initiation" into the RPG's. It's not for all, so don't worry about it if you can't get into it!
Same goes for 2 and 3...although the storyline gets a little better in those.
Keep amassing spells...some of those spells (especially Tiltowait... think "Firestorm", Carg!) are vital later in the game. Also, you can get rid of quest items once you've used them. AFAIK, all you need to complete the game is:
Munke's Wand (from the Duck of Sparks, level 2)
Lightning Rod (from the Temple of Fire, level 7)
Bird in the Cage (from the Loon, level 4)
Jack of Spades (from Level 4)
Queen of Diamonds(?) (from the pool in Level 6)
King of Hearts(?) (forgot where you get this one from)
Ace of Clubs from one of the gatekeepers.
If you accidentally get rid of a quest item you need later, you can always go back down and get it again. They do respawn! (thankfully).
Also: look for the hidden level in level 777: you'll meet La-La at last (and get some VERY nice equipment).
-Saz