What's the best way to change the radiator?

[Dragonwind]

I want to change out my left and right radiators. They were never cleaned and when I did it I discovered all the junk rotting into the corners. Is there a special method I have to use to 'prime' the radiators once I swap them or can I just follow the fluid change procedure and refill from the overflow tank.
Thanks,
Chris

EDIT: The main reason is when befoer I cleaned it I detected the antifreeze smell. When cleaned the dirt did smell too. I ran the car at temp with the radiator hanging there and there were no obvious leaks. I can still get a wiff once in a while too. My coolant level is not going down fast (takes months before I have to top off).