So there is a hacky simple way to do this. Assume you want to change the mantel to be purple.
Take the w_lghtsbr_005.mdx/mdl files. Copy and rename them to w_lghtsbr_008.mdx/mdl. Override the existing files in the override folder.
Since the model used for each blade is a little tricky you can find a table of all model uti relations in the resource pdf on page 6.
You need to look in the Column "Model Num." Start with the color you want the lightsaber to have. Copy the mdl/mdx files and rename them with the number of the saber you want to replace.
The next step is to replace the icon file with the correct one. Again look for the icon you want the lightsaber to have and copy and rename it with the saber you want to replace.
I hope this helps you to tune the mantel and heart to your liking.
Cheers
Thanks for ur time and information I might not got what I wanted but now I know more then I did before but I hope someone fixes this in the future but for now I'll accept that nothing can be done
I've slowly been working on porting Brotherhood of Shadow to KotOR2 along with KotOR1. https://www.moddb.com/mods/kotor-ii-tsl-expanded-galaxy ( it's a long way off being done though )
But as I mentioned previously, it works fine on Android as shown by many YouTube videos, you just have to install it on a PC first then transfer the updated files across to the phone.