First kill the Imperial Transport that has docked with the Freighter. Do this right away, you only have approximately two minutes to do it. Then wait around the disabled Freighter and when the FRG arrives kill the T/Fs that get close (your wingman should help) using dual fire lasers. The Y-Wing is sometimes underated as a killing machine, but because the lasers are mounted so close together they present a very formidable weapon. When the two transports show up kill them both with dual torpedoes, remember that the "R" command will not work with them, so use the "T" command and cycle through until you have targeted them.