That's OK. I read the help file trying to find the answer and I did. Turns out if you already have override files that you can work with all ya got to do is launch the project manager and start a new project. Then load in the override files ya want to edit and then dbl click them and edit them. Took awhile, but now Bao-Dur has Atton's 2 lightsabers, I made the second one a short saber instead of both being regular ones, changed the color on both form yellow to blue and purple and Atton now has Bao-Dur's lightsaber which was changed from blue to yellow.
I even modified the Exile's Saber so he can use it on the upgrade bench. This took a little more doing as I could not figure out WHY he couldn't, so I just used one of the lightsabers found in the chitin.key or wherever the default ones are read from, (still not sue on that), and simply copied his special stuff from his exported xml file to the end of the default lightsaber xml file. Same with the Handmaiden who also couldn't upgrade hers.
Using what I've learned I could basically do anything I want with weapons and items in the game. I can for example take a default gun and make it stronger and only useable by Mandalor and I then just save it as a new file name still using the .uti extension directly into the Override folder. Man this modding stuff is easy.
Oh. forgot to mention you can use the Extract file button on those default files to extract them to anywhere on your computer and then start a new project and add them directly into the Ovedrride folder before you start working on them.