How to make a 10th prestige lobby using VAC chaos
Since xpscale won't work past 4, I found another way to get a log of XP.
Enter this before making a lobby so you're always host(it'll give you error messages but should still work):
party_hostmigration 0; party_connecttimeout 1; badhost_endgameifisuck 0
Join a cage match and have a friend join right away before someone else connects. Once the map is finished loading and you are at the class selection screen enter this in the console:
sv_cheats 1; map mp_rust; g_gametype koth; koth_autodestroytime "100000"; koth_capturetime ".1"; koth_kothmode "1"; koth_destroytime".1"; scr_koth_scorelimit "1000000000"; ui_allow_teamchange "1"; Fast_Restart; g_speed 200; scr_xpscale 4; cg_brass 0; map_restart
Once the HQ comes online, have you and your friend stand right next to it and you'll get boatloads of XP. (I got from 4th prestige legit to 10th prestige using this in ~1 hour) The only problem with this is that you'll get kicked as soon as someone in the lobby hits level 63, it's some kind of bug. Once that happens have you and your friend restart MW2, and repeat the proccess over again(beginning with the host migration code). Happy leveling (thanks?) .