Convert rear brakes to disk

I noticed that disk brake parts are available for my '97 Lumina. I now have drum brakes on the back. Anyone know how to convert to disk? How difficult? what extra parts are needed? what problems to expect?

Thnx

Mechanically, it would be an easy swap if you had a complete donor car to scrounge from.

Getting the ABS to understand what happened could be trickier, I think. Or maybe not. I don't know if the control system is the same...