Infinite XP Glitch in Rainbow Six Vegas 2

Well, I have yet to pick up this game. I kicked the first Vegas game in the nuts, and I enjoyed it, but this seems more of the same. I am still picking the game up, but not before Dark Sector. Yadda yadda yadda I know.. but isn't it strange no one has suggested a RSV2 FNF?

Anyways, here's the glitch. Rumor has it that this is feesable on both systems, but I wouldn't know. Enjoy!