I believe all you'll have to do is download the KotOR Tool.
Use the KotOR Tool to open the .utp file (From the mod in the your OP) and find the Inventory tab.
From there you should see a list of items that are within the container. Change the name of lightsaber .uti to the name of the lightsaber .uti you want it to be. (You'll have to know the name of the Exile's Blue Lightsaber .uti and have Exiles Lightsaber pack mod installed)
"It's the one that says Bad Mother ****er." - Jules Winnfield... Describing his wallet, Pulp Fiction.