The Wizardry 7 version had a list of all the items and their properties. That sort of list for the W&W items might be useful for decrypting the rest of D6Item.dat
I think the manual is basically abandonware, if you have it in electronic form could you post it in this forum? If it is hard copy, could you post images of the item section if any.
If there are legal problems, I have posted the Excel Spreadsheet that I used to analyze the data. People can check the entries themselves. They may spot something that I missed. (One thing I found useful: Custom sort enables you to do things like eliminate all entries equal to zero.)
Spreadsheet can be found here:
http://www.ironworksforum.com/forum/...59#post1225359