Weapon change.

Thank you very much for this guide; I'll say right away that I want to know how to view the bones.
Otherwise, the guide is quite understandable; thank you for your help.

Everything is clear with the archer anyway.

I knew half of the information; I just didn't know what and how to do with the effects.

I would also like to know how to attach the specific part of the model.

And most importantly, how to open (load the model into the program) and correctly save the geometry in Archangel?

There is a YouTube guide on how to view the bones: https://www.youtube.com/watch?v=dJRyPStxtl0
The link to the program is in the video description.

How to attach the desired part to the model... There are two options: the first is to extract the model from the game, cut out a piece, and load it back.
The second option is to erase everything unnecessary on the texture; I used to do that too, until I learned how to load it.

Saving the geometry in Archangel...
That is, converting the model to a readable format.

For example, there is a model - F8B6E9F5-0045-4930-A6A3-2D32C71366D6, a zombie, lying on the desktop, and next to it are random dds textures.

I drag it onto the Archangel shortcut, a window pops up and asks to load a dds texture.
I choose the first one I see; the model is simple, so the window pops up only once.
I see this picture:
image 1

Then I click on this button, and that's it; a file appears on the desktop. If I don't load textures, the file doesn't appear.
image 2