Need Assistance with some modelling

[SplitResonator]

So, I got this cyber arm mod for fallout 3 and made it compatible with New Vegas I want to use it on my female character but the issue I'm having is the that the cyber arm is on but doesn't hide the arm only the hands (for obvious reasons considering the fact the arm is attached to the body and the hand is separate)...Now I want to take the upperfemalebody.nif and I want to somehow take the right arm off the body to make it invisible so that I can use the cyber arm without the cyber arm clipping into the normal arm. now I cant get blender to ever freaking work with niftools and such it always crashes or there something wrong and I already have to deal with computer and software troubleshooting where I work so I don't want to deal with blender. also I had a student version of 3dsmax that for some reason I can't use anymore. so in other terms Is there any other way I can approach this?

 

here is the body I want to take the arm off of http://www.nexusmods.com/newvegas/mods/44709/?

 

here is the cyber arm mod http://www.fallout3nexus.com/downloads/file.php?id=14676

 

Disregard this thread ignore it...No need to reply