Ive finally got it after deleting my patch.
I used the memory 4 - 2 method given on xbox360A, but substituted the datura bomb he uses in that video for a smoke screen. I tried it twice, and it unlocked the second time... after 3 or 4 hours of trying elsewhere, with the patch installed.
So, id like to say it was entirely glitched, as it DID pop up directly after I deleted my patch... but I also was trying a different method, which couldve had something to do with it.
Im just happy it finally popped up.
Worlds Fastest Platinum. Counter-Strike Global Operations, 28 minutes 25 seconds.