You can just open the module you have the item in in the toolset. With the module still open in the Toolset find the temp0 folder in your moduels folder in the NWN folder. In the temp folder there will be a file with a the ResRef of the item followed by a .uti extention ( ResRef.uti) this is your item Blue print. Just copy that file into your override folder. you will then be able to DM spawn that ResRef into any module you are playing.
What happens when you open a module in the toolset, is all the resources that are in the module are unpacked into the temp0 folder. Note: it is only resorces in the module not the ones in Haks or the OC.
To try and answer your questions on the results you where getting.
To be able to spawn an item in the module it has to be one of the resources for that module.
resources come from several places thay are.
BIF files. (original content .bif)
Module file (.mod)
Override folder ( will override any OC or .Bif resource with the same name )
Hak (.hak will override any file of the same name, even the ones in the override folder)
now an item does not have to have a ResRef Or blueprint in the module in order to be there. It just has to have Blueprint in order for the module to create one from scratch. ( I think this was a 1.68 or 1.67 upgrade Befor my CC days)
When you start a new game NWN creates a new folder called 'currentgame' in the NWN folder and copys the module you are playing into it. It updates this new module with everything that happens in the game.
When you save a game it makes sure the game in the 'currentgame' folder is up to date and copies it to the saved game folder with a .sav extention.
Now when you open a saved game It just moves the copy or the file from the saved game folder to the 'Currentgame' folder. Hence the reason the changes you where making to the original module where never taking effect.
Now the OC games do act a little different. the saves for one of the OC games ae never full modules but just the changes that took place in the game. So when you open an OC saved game Any resources changes you made to the original .nwm file could possiable show up in the save reload. I have never tested it, but it sounds like what happened for you.
If you want biowares version of how this all works you could read 'Documentation: Key and BIF File Format pdf'
here.
Modifié par Lightfoot8, 09 août 2010 - 06:48 .