[font=Verdana,Arial,Helvetica]Disclaimer, I don't recommend the following procedure, I have not tried it nor have I witnessed it working.
They would pair up - two guys to a boat, pull the boats off the trailers onto the ice. They would then each put on an ice creeper on opposite feet, one guy on his right foot on on his left. They would then get in the boats, with their ice creeper foot to the outside and push the boats accross the ice to the open water. Getting the boat back up on the ice was just a bit more violent than driving up onto the boat trailer. They'd give the outboard a shot to raise the bow and hit the edge of the ice with enough momentum to send it correning a ways across the ice. Ice creepers back on to finish the return.
Were they pulling our leg? I don't know I'm way too old and mature (scared) to try it. [/font]