This doesn't go in Tech Support, I don't think. But anyway...
battle.lgp is where all the battle models are. It can be extracted with several different programs.
Highwind is the one I've always used, but there are others.
This page has the complete list.
(Apparently,
Aali's LGP/UnLGP program is all the rage at the moment, but the download link isn't working for me...)
Also, I believe you've encountered
this before. The two letters you see in the list correspond to the first two letters of the file. In other words, every file in the battle.lgp that has "aq" as its first two letters belongs to the MP. For example...
"aqaa" is the Skeleton File, which includes all the "bones" of the model as well where the different parts are attached.
I'm not too clear on what "aqab" is... I think it has to do with animations.
Any files between "aqac" and "aqal" are Texture Files (although the MP probably doesn't have any).
All files between "aqam" and "aqcz" are Part Files - each file is an individual part of the MP. For example, "aqam" is its chest, "aqan" is its head, etc.
"aqda" is the Animation File, which dictates how the bones are arranged when the MP is doing different things.
The number one tool for editing most of these things is
Kimera. The file you should open if you want to edit the MP is "aqaa" - opening that allows you to view the entire model and his animations.
I don't know much about PCreator, however, so sorry...