So I installed this and got a contract to take a rich Kerbal to space for four hours, so I whip up a simple rocket with two pods and leave the second one empty for the guy. The blurb text mentions I'm supposed to pick him up from the pad and the image gallery from page 1 shows a nice GUI to manage passengers, but I can't find any way to make the guy get in the rocket. How do I open up the menu to manage passengers?