mate, I ran the old Bravo Two Zero Mod. I realised very early on that it couldn't sustain enough missions to justify all the addons and all that crap that had to be made to make it a decent mini-campaign. That's why it was put into the SAS MOD because then we had a reason to make all those addons other than for a very short campaign. We're working on B2Z at the WDW mod over at the ww.opflash.org forums so if you want to get brought up to speed or just find out what we're doin come along. Most of us are on holidays at the moment though so be prepared for a wait.
B2Z has been attempted many times mate, and there was never that big a response from the community, don't waste your time for such a small amount of missions.
Cheers,
Phantom