by bullfrog » Saturday Aug 13, 2011 5:05 pm
A funnel connected to a tube connected to a liquid out disconnect connected to the liquid out post of a purged keg with its hatch sealed and pressure-relief valve open, may do the job. You'd probably want two or even three people doing it so as to keep a constant flow of the bottled beer into the funnel, limiting the amount of bubbles that would end up in the keg.
You'd also want to get through the keg pretty quickly after transferring too, I'd imagine, as wet cardboard (oxidisation) isn't a tasting note you want your mates picking up on in your beer.