Setting AC LOG rig interface for the Elecraft k4 is similar to other radios, however I found it much easier because I did not have to download drivers.
N3FJP"s rig interface for the Elecraft K4 is accurate and dependable without losing connection. AC Log from N3FJP is a highly customizable logging program that offer contest logs for most contests.
I found the connection process to be straight forward and easy.