Hello! :) Welcome to the Forums.
I would have answered your question quicker, but I had to find some resources online. Sorry for the wait.
Some tips:
1. global.jrl (Use T-KGFFEditor.)
2. globalcat.2da (Use Fred's KotOR Tool.)
3. Here is a resource:
http://www.lucasforums.com/showthread.php?t=143372)
4. If you open up DAP's readme, I made a small list of changes I made to these files. After you open the global.jrl & globalcat.2da, you will be able to look them up by number.
5. You need to know some small stuff, so I would read the resource page in number 3 carefully. There are things you can miss, so pay close attention to details. Example: After you add -1 to the PlanetID box, you need to hit the enter key. You cannot just hit tab.
6. You can easily copy & paste from one file to the next. Sometimes the GFFEditor is a little touchy. That is oky. Just edit the file with some patience.
I hope this helps in getting you started.
If you cannot copy & paste into the discription area, and it is still grayed out, you must hit the enter key after editing each box in the GFFEditor. If you don't hit the enter key, the gray discription area stay gray. It is a little touchy, so take your time.