PrtyLizardJedi created a very detailed tutorial on retexturing (with pics...ooooooo). Check out his site, the tutorial is towards the bottom of the page:
http://www.freewebs.com/myzips/)
::EDIT::
oops! you wanted a lightsaber tutorial? Then check out Achilles' "Making a Custom Lightsaber" tutorial:
http://www.freewebs.com/achilles01/tutorialsreferences.htm)
It gives you a rundown on making a custom lightsaber, to which you can apply a silvery texture (would be unique lightsaber). OR if you only want to change a blade color
Open Kotor Tool and expand the following tree:
ERF's > TexturePacks > swpc_tex_tpa.erf > W
Scroll down and locate the files: w_lsabreblue01, w_lsabregold01, w_lsabregren01, w_lsabrepurp01, w_lsabrered01, w_lsabreturq01, w_lsabreyel01 tpc files.
Double-Click on each color (or the particular color you want to replace)
In the window that opens, you'll see a pic of the color texture. Click the "Write File" button and choose a directory to place the file (don't choose your override folder....for now)
Next, to the bottom left there's a white window with the entry "blending additive...decal 1". Highlight and copy this text (Ctrl+C).
Open Notepad, create a new document and paste (Ctrl+V). Make sure that "blending additive" and "decal 1" are on seperate lines and that there are no spaces after each line...or below).
Save the file as "w_lsabrexxx01.txi" replacing the x's with the particualr color you're replacing. Make doubly sure the file has a ".txi" extension and NOT ".txt"
Now, goto the directory where you saved the .tga files (when you clicked "Write File". And open the particular color .tga you want replaced in a graphic editing program (Photoshop, PaintShopPro, Gimp, etc...)
Now you can re-texture the said file to the color you want. It would probably be easier for you to just adjust the Hue, Saturation and Lightness, but I'm not sure how well "white" is going to work out. Your Alpha Channel is set to white...so you may have to make your saber "off-white" or have a "grayish" tone.
Once done, Save your re-textured .tga file, using either the same filename or with the filename of the color you want to replace (ie - w_lsabregren01.tga) Make sure your .txi file has the same name as your .tga file!
Drop the files (.tga & .txi) into your override and voila! New saber color :)
** Note - the above method will replace ALL sabers of the original color, so if you edited the green saber texture, ALL green sabers are going to be white...
OR, finally...you can do it the REALLY easy way :rolleyes:
http://pcgamemods.com/7240/)
Have I confused you yet? ;) Let us know your progress!