3dsmax noob needs help

Hi, I need some help with model ripping using 3dsmax.I am very new to this so please forgive me for my ignorance.
I was playing around trying to port weapon models from Operation Flashpoint Dragon Rising using ninja ripper and have suceeded somewhat in getting the model ripped but have come across 3 seperate meshes of the weapon model.
Do I need all 3 meshes?

At the same time, I am at a loss despite countless online tutorials as to how I would be able to texture my model. I have located the two texture files using WTV and I would like to know how I can use them on my model in 3dsmax.

Notes:
Using 3dsmax 2015 and latest ninjaripper.

If the meshes are part of your model then you obviously need it. And for the texture problem, just drag and drop the texture on your mesh simple as that! :dance: ( Well atleast that’s how I do it)