you are good to go: While your hazey keg is hooked up to CO2, turn the CO2 pressure up to 35psi. Prep an empty keg to receive your beer, purge with CO2, and then, seal the lid with 35 PSI. Then hook your "OUT" from your donor keg to the "IN" of the filter, and then the output of the filter to the "OUT" of the empty presurized receiving keg. This requries 2 OUT jacks hooked to the filter unit.
Now, you just need to start releasing pressure from the receiving keg slowly and let the pressure difference do it's work. The donor keg will push carbonated beer through the filter, and if you have enough pressure behind the beer, you won't need to run the filter's pummp at all. It'll take over 2 hours, but it works.