I have made a very simple mod that will allow players to change the colour of one lightsaber blade to another. Contained in the zip is all the blade colour textures.
There are two ways to alter the colours. The first is simply by taking the file for the colour you want to use and renaming it to the file name for the colour you want to replace. For example, if you wanted to replace the turquoise colour with blue (like I did
), you would just take the blue file, rename it to the turquoise file name, and place it in your override directory. All this is described in more detail in the included readme.
The second way is to replace and exisitng colour with a new colour that is not already in the game, you can edit the file (which are in the .tga image format) with an image editing tool such as Paintshop Pro or Photoshop. Once the file is altered, simply place it in the Override directory.
You can get this mod here.
It is about half way down the page under "Lightsaber Blade Colour Replacement."