First question, Your out of luck, This is the main reason my Alliance has rented a ranked server months ago. EA screwed the Private server community and the modders by Making it impossible to unlock the weapons after v1.0Its like this, Why should the folks that have NO intrest in EA's cheesy Ranking system be locked out of the game they bought? I mean if its an unranked server why the hell make people have to use the crap stock weapons on there own unranked server? Bad enough the dedicated server box costs $350 a month already and now we have to rent a $130 ranked server also?
As for the allowglobalunlocks, Thats so(if enabled) people that have Played EA's ranked server game and earned unlocks can use them in your private server or LAN game. If Off, you use the stock weapons.
Harry