Some questions about Classic Interface

[Spellman]

Hello MaxCheaters!
 

First of all, thank you for your time in reading this. 

A few days ago, I started to learn how to change the user's interface (Just visuals, not mechanics) for a specific server that I'm currently playing (Classic 2.5)
The files that i'm working are: 
-L2UI_CH3.utx
-L2UI_CT1.utx

If I get those files from the client that I’m playing, I cannot open it. (I suppose that are encrypted or something like that).
The solution of that, was searching the files on this forum from someone who shared his custom interface for Classic (I don’t know the specific version)
The  problem I got was that the class icon of the Party Status Windows and Clan Windows, are displaying just a black square or not showing the correct information of the class. Same for "Compound" button from the inventory Window. 


 

I want to know if there is a way to fix it... I don’t know the name of the .DDS/.TGA file to replace it for the correct one. 

 

The another question I want to know the name of the .DDS/TGA that manipulates the bottom bar and the experience gauge of the interface. 
 

Once again, Thank you!

Edited November 17, 2020 by Spellman