IIRC, you'll use Planet Approach to set the course, and Orbit Eject to execute the burn. Full instructions for this are available in the IMFD Full Manual/Playbacks, available at OH. This Manual will be updated soon, and include some new techniques to make flights more efficient, such as taking a stock DG from Cape Canaveral to Titan (via Jupiter) without refueling and having 34% fuel remaining (total burntimes after the first plane change enroute to Jupiter are less than 30 seconds!)
[nomedia="http://www.orbithangar.com/searchid.php?ID=4142"]IMFD Full Manual/Playbacks[/nomedia]
This is the original, if you don't want to wait for the update.