Lol why didn't I think of that !!
Do I need to actually buy the maps to activate them after I have installed the files on my JB?

P.S did you know when you host a Search and destroy with your stealth v2 after the first round everyone keeps respawning and it's 40000 xp per kill lol. Just thought I'd tell you as it surprised me

damn lol..
and btw i thought i would let you know on your stealth v2 in an online search and destroy after the first round it turns into unlimited spawn big xp without enabling the mods :S
i definatly didnt activate the mods and it just changes !!

everyone keeps respawning, yes BUT only if you enabled the mods for everyone :p
& yes, i'm very well aware about the 40000XP

there's a reason for that.. if you get 40000XP i can imagine you go straight up to rank 65 (can you confirm this? i can't test it myself right now :p)
thus ranking up 'legit' will unlock all weapons
i can unlock the attachments + challenges, which (combined) would make it into a FULLY WORKING challenge lobby as ppl know them

all i need to do is get the attachment unlocker in an MP patch & good to go