Cleaning commercial kegs.

I have a friend that owns a retail beverage store and I told him I wanted a couple of 15gal kegs for homebrew. I was going to use them for brew pots but my wife game me an awesome Fathers day present that took care of that.So I figured that I would use the for kegging. My question is how the hell do I clean these and how do I get the homebrew in. This is the first time I have ever been able to use these.

EB

Honestly, unless you plan on brewing (and drinking) 15 gal batches, I'd give them back or sell them and get some corny kegs.

I fooled around with the comercial kegs for awhile too. I gave up due to the PIA of the snap ring and cleaning issues. Corneys are much easier.