OK, I got the the Battle sword replaced...Whoohoo! This is how I did it:
I needed to know what .tex files replace the sword model without changing the character model along with it. I looked hi and low (+ the help I got here) and found this:
https://www.ff7catalog.com/threads/13344/
This let me know what files were needed to replace just the Buster Sword.
Once I knew this I could take the correct files from either here:
https://www.ff7catalog.com/threads/7057/
OR:
https://www.ff7catalog.com/threads/9036/
If you want to know what files are needed to do this:
rtaf
rtck
I used ulgpGUI v0.5 aio to unpack and repack the battle.lgp file.
I assume, that since these files are all available to the public, and I only linked to the respective owners, that providing a guide of sorts is OK...Mods?
This is awesome because I can use any Cloud battle model with this sword. I really didn't care for the APZ Cloud model.
Just to note: I'm also editing (Wall Market) all Clouds swords to use the Buster Sword model. This way way I can upgrade the swords normally but retain the Buster Sword look for each sword in battle. This goes really well with the Buster Sword on the back of Cloud in the field. This was the look and feel I was going for.
Under Weapon tab
Model ID:00
Attack Tex:09
Do this on all Cloud's swords.
https://www.ff7catalog.com/threads/9052/
The field Buster Sword I cannot change to look like Gold Hilt model. I know the sword is connected to the model and that's a little beyond my skill set. Like I said I didn't care for APZ model too much. I suppose I could try, (I'm a very determined person sometimes) but the default field sword looks right with the other models. Unless someone out there has an itchy model finger and wants to do this for default model, and of course bragging rights, I won't be offended.
Thanks guys for the help.