I found the way to add 45 more base items to the game. I can now add tiaras for mages, katars, scissors, macegloves, knuckledusters, dexterity class armors, more variety of staves for monks, etc etc etc. 45 is quite a number for this game.
But this addition would come at the cost of NON-unique item morphing. Perhaps, massive morphing. I wouldn't think twice if I was the only one who plays the game, but since I'm not...
What say you, people? Is it worth it?
upd: it seems that morphing will occur to ALL items, including gold. such a change will make ALL items from previous versions useless and will require that you toss everything you have away and save a character with empty inventory.