I saw this a bit ago.
Put your beer into a corny keg, lay it down on it's side with the "gas in" down, Raise the bottom several inches.
Reverse the in and out's, Put the CO2 on the beer out line (1 psi, just to cover the beer) and put a picnic tap on the Gas in.
This must be used with the tap lower than the keg because gravity will dispense the beer.
If you let air cover the beer you better drink it within a couple of days.
I'll keep an eye out for the source and post it if I see it.
Fred