Hey!! So I've been struggling with this exact topic for a long time, I've been trying to use the XXYYYYYY formula (wherein XX represents load order in hexadecimal format given by TES4edit) and YYYYYY represents formID (given by TES4edit or Construction Set, since they're the same number). It NEVER worked for me. Rather, it only worked for me for items from my mods up until load order # 09; when I tried to add items from my mods from load order # 0A and beyond it would NOT work. SO I finally found a mod: https://www.nexusmods.com/oblivion/mods/16704 called Find FormID (you'll need OBSE for this to work properly) and FINALLY the items from mods display using the CORRECT mod load order. For example, for one of my mods TES4edit gave the load order as A7. I would type in player.additem A7YYYYYY (YYYYYY being the form ID) into the console and an error message would always pop up saying the item couldn't be added. I enabled the above mod and when I click on it in the world, it has the mod load order number of A3!! Wtf?! Not sure why this happens, but the correct load order always seems to be a LITTLE off compared to load orders shown in TES4edit. So if you're looking to add an item from a mod that, let's say, you can't find in the world (maybe due to conflicts or whatever, I'm not a modder so I'm definitely not going into TES4edit and trying to alter stuff on my own), download and install the above mod. Then, if you have another item from the mod (from which you want to add an item) in your inventory just drop the item, press alt and then right click on it, and a scroll will pop up with the CORRECT objectID number. Type in player.additem then the correct objectID number given by the FormID Finder mod, and the number of the item in question that you want to have. Example: "player.additem A300315f 20" Voila! Anyway, I'm pretty illiterate when it comes to most modding jargon, I just love Oblivion and love playing with mods, so finding this mod was a godsend for me. I hope this helps someone else!