Building a Kegerator
I wanted a tap system with four different beers available from the tall five gallon kegs. This would give me plenty of variety without having any one beer last too long (past it's prime or past when I would get tired of it).

I tried to find and buy a kegerator that would fit my needs. The closest one I found was one that is designed for four corney kegs of homebrew. It would work fine as long as the kegs are of the tallest variety. But a lot of commercial five gallon kegs are an inch shorter and a inch wider, which makes them too big to fit in the space of a 1/2 barrel keg, thus too big for the standard kegerator.

So I had to build my own.
And this is my story

To the right we see the finished unit. On top I have a standard four tap T-tower with drip tray. This is built on top of the cold box which is built into the underside of the bar. The gas comes in from the left and the refridgeraton in on the right. A door seals it all in.

The Hole

I took the area originally designed to house a stand-alone kegerator and built it up to the underbar level. On this platform I was able to place the tap tower directly above the box, drilling a hole for the beer lines and for the drip pan line.
Insulated Box

I insulated the box with styrofoam sheets from Home Depot along with lots of foil tape to seal the seams.
Beer Lines

Here's a shot of the top of the keg box where the beer lines and drain line come from the T-tower.
The Fan

I took a dorm fridge and removed the door.

The shot above is looking directly into the fridge. The coolant source in these small units is the sheet of metal that makes up the freezer. I removed the door from the freezer to expose as much area of the metal plate as possible. There was no air circulation, so I added a small far from Radio Shack to get the cold air out of the fridge and blow it into the keg box. I have since moved the fan up one shelf to in front of the ice box for better effect.

The Fridge

I pressed the fridge up againt the keg box, applied styrofoam and insulating tape, and sealed it all in using foil tape.
Fridge Meets Keg Box

Here we see a hole I cut to match the opening of the dorm fridge.
Got Gas?

I had a nice small space just outside the keg box that was perfect for a 10# gas tank.
Gas Line

Without the tank in the way, we see where the line goes from the tank and into the outside wall of the keg box.
Gas Distribution

I got a four way gas distribution bar to feed the four kegs. This is a nice bar mounted on the inside of the keg box. Each line has a cutoff so I can turn on/off each keg individually.

A setup with four different regulators would be really nice, but a lot more expensive. So far I have been happy with this setup. If I want to drop the pressure on a keg, I just turn off the gas for a couple of pints. If I want to add carbonation, I can turn off the other three lines and force carbonate the remaining keg.

You can also see to the right of the distribution bar where the gas line comes into the keg box.

Doorway

I lined the doorway with ribbed insulating tape from Home Depot. I also used some black insulation foam tape on the doorway facing. Looking at the door picture to the right, you can see where it also has ribbed and foam tape. The door and doorway fit tightly together and the ribbed tape join like interlocking fingers.
Door

The door is a 1x2 frame filled with styrofoam and surrounded by insulating tape as discussed.
Done

And here we have the finished project.

Add a gas tank, hook up some kegs, put the door in place, add a skirt to hide the fridge, add tap handles, then relax with a cool one.