Replacing Bazooka with Pipe Gun

I manged it by changing the Bazooka.xom with PipeGun.xom but the gun looks weird as it's just floating in mid air and in first person it looks bad so what are the variables in weaptwk.xml to put it correctly?

I tried editting FirstPersonOffset but it can only go so far and still doesn't looks correctly in FP view, I like the model of the PipeGun tough, it's a shame it was deleted from main game, they could have atleast have made it as a custom weapon for the weapons factory, oh well.

Anyone managed to correct the PipeGun to appear in-game in place of other weapon? do I need to edit the main .xom file with a model editor or just tweak some files? (which files then?) to correct the coordinations of the gun in both FP and normal view.

Meanwhile, I understood everything, but the weapon takes the evil worm because of the animation that you have to change them.
for example on weaptwk.xml there are various sections of weapons, take the bazooka under there wrote: WXAnimHold
and this means that this animation and a weapon that keeps the worm!
for a new animation, namely that of pipegun that I know for a long time, you must have a program called xomview 2.8 and open the file with this program and there are worm4.xom all its animations
creating and saving you appoint an animation and then the name you put it where there was any code that you have said about weaptwk.xml
BUT ALSO I AM LOOKING FOR AN ANIMATION PIPEGUN, ALL IN FAVOUR OF THOSE WHO WANT THE ANIMATION!!!

What? sorry could't understand you there, I got XomView but how can I fix the PipeGun correctly to function correctly when you hold it?