Adding a module to a preexisting campaign

Apologies if this has been answered but I can't find it anywhere. I have a campaign I'm running and I would like to add adventure modules that I've bought off the market place into it. Is there any way to do that? Copy/extend simply creates a copy, import characters lets me bring in characters but I can't seem to find a way to add a full module to an existing campaign.

You're a Mentor; what about using the Transmogrifier to shuffle things into a new campaign with the module set in it?

Ahh cool. That worked. I didn't realise that's what the Trasmogrifier did. Thanks mate