And for the Item Upgrade mod....
http://weidu.org/c2/README-ItemUpgrades.txt
Section I. About
~~~~~~~~~~~~~~~~
The Item Upgrade Mod Pack allows Cromwell and Cespenar to upgrade more
items for you. Half of them are conveniences, the other half try to prop up
weapon categories that are "weak" by comparison (e.g., maces and clubs).
Section III. Items
~~~~~~~~~~~~~~~~~~
The items are listed here with the components on the left and the result on
the right. For example, the first group means that you can forge a Ring of
Protection +1, a Ring of Regeneration, a Diamond and 10,000 gold into a Ring
of Preservation +1.