I think some 50 pages back or something, someone mentioned holding L + R when booting up MHX or Gen with JK Save Manager, and you can find it and export it from there. Maybe give that a try?
Here's something totally off subject kind of, but if you wanted 1 of each fully upgraded weapon, you'd need 1,247 slots. Just a heads up for anyone attempting to do it.
Weird, I only had about 4 or 5 unlocked before I used to quest completer but now I have all of them. By weird I mean it would be weird if he still only had 2.