Ok. what do i add to the 2da file. do i put my new saber's uti file name??
First you need to make a new lightsaber crystal. The only things you need to change are the item resref, the tag, and the description. You can also change the cost if you like.
Then, in upcrystals.2da you start a new row. This table shows you what to do. The first row is what you will see at the top. The second row is an explaination of what you put there. The third row is an example, for the lightsaber with variations g_w_shortsbr78, g_w_lghtsbr78, and g_w_dblsbr78 and crystal g_w_sbrcryst78.
http://www.lucasforums.com/picture.php?albumid=607&pictureid=6916)
Note that you do not need to have three variations, you only need one. If you don't have three variations, put four asterisks (****) in instead of a filename/resref.
and how transparent should my alpha channel be??
That is up to you; the more transparent, the more shiny. Experiment.
You also need to make sure you have a .txi file with the same name as your texture file.
Hope that's helpful!