Keyclone (i.e. the user that wrote the program) walks people through that all the time.

However, there are a number of good guides on the topic. Getting started is as simple as setting up a command for each client and then launching them from the front pane (e.g. call them Char1, Char2 in the commands, enter "Char1;Char2" in the box at the bottom of the front pane, then hit Connect).