But how do you do this if your not a computer geek/hacker/nerd?...no afense though.
I was saying it was
not possible. You'd need access to Badspot's files, which he hasn't released.
I'd like to see you mount two images to the same node.
Set the
mountpoint field of both weapon images to the relevant point and mount the two images to different slots. You need two different datablocks, but it works.
You can have a 'sleeve' image that's mounted to slot 17 or something (one that no-one uses) but shows up attached to your hand and offset so it appears where it should do, and a gun in slot 0 that appears in the same hand and actually works.