XCOM: Enemy Unknown Cheats
You can use it on stuff in the grey market if you have enough.
Or at least that was my experience. Ideally you should have 5+ of an item for this (I even used it for UFO flight comps and power sources). Just go to the grey market (situation room) to see how much you have of each item. 'First scan' the value (i.e. the amount of whatever you wish to increase) in CE (no need to change any of the settings just select the XComGame.exe process and search with the default ones). Sell of 1 unit of the item and use the 'next scan' option with the new value. Repeat that until you have 1 address left. Change the value of that address to a high enough number (enough to last you through the rest of the game, 5000 or 10000 should do). And done.
It will be persisted in savegames so you only need to do it once.
Edit: Just noticed the new savegame editor has Unlimited Resources option, it sound like that would do what you need too.
[Edited by Nasedo, 10/12/2012 2:48:48 AM]