Didn't know if there was already a reply to this one (didn't see one) but this can easily be done via scripting. There are multiple coop multiplayer maps out that have a switch at the briefing screen that allows the admin to switch between playing the intro and not... there's an .sqs file and a line item using parameter in the description.ext file.
I'm sure this would be easily integrated into OFP2... however there is a limitation of 2 parameters in OFP today, it may be possible for BIS to put in additional parameters to be used...
