I've used Cosmic Forge to view and edit many things, but I don't yet understand how to directly edit save files (savegame.*): I've used other editors for that. Thus, how to do this if it's available in the latest version (4.23)?
I've always considered unravelling the datafiles to be one of the games puzzles.
Wizardry 6 is pretty straightforward, the player stats are right there in plain hex (7 bytes), followed immediately by the skill scores, instead of being combined to save a few bytes. Hitpoints, spellpoints, ability scores et al also.
Spells are a bit trickier, you have to do a bit of binary math, attached file should get you started.
Equipment is a touch trickier, there are files on the web that will give you the codes, if memory serves it is 8 bytes per piece. Deleting an item the game wont let you delete (like that 5th Rubber Strand... Really? WTF!) is a bit trickier, I've had good luck with changing the items codes to something expendable (like arrows or bullet stones)... hmmm... GoG won't let me attach a text file or a zip file to this post... anyway, item lists and codes can be found on the net.
Threw together the dbs file format from memory, so some of the locations may be off by a byte or two, but they are darned close.