Have some sagely advice.....if you have more than 2 ships that the same things are going to happening with.....use copy and paste. you can copy the entire SexP, and then paste it.
so you build the SexP once for ship A, and it arrives at a waypoint, and a message comes up and says "hey you idiots in command, we are at the drop off point and releasing the cargo." then you build another Sexp telling it to move to another waypoint.
Then it moves to the other waypoint and warps out. (for example)
ok, just create events and name them the same as the ones for ship A, but make sure they are named for ships B, C, and D.
so you have the following:
freighter A reaches waypoint
freighter B reaches waypoint
freighter C reaches waypoint
freighter D reaches waypoint
freighter A undocks
freighter B undocks
freighter C undocks
freighter D undocks
freighter A waypoint
freighter B waypoint
freighter C waypoint
freighter D waypoint
ok, so we made 3 SexP's, right? one for each action that Ship A performs. Then we just copy the SexP from "Freighter A reaches waypoint" and paste it in for B,C, and D. Then we simply replace data to change freighter A to freighter B in the SexP, then we replace data to change the waypoint, and then we replace the message sent. it's much easier and faster than building a sexp for each one.
then do it again for undocking, and then for ai waypoints, and all four freighters will come in, move to waypoints, send a message, drop cargo, and move off again. then have them warp when they get done with the new waypoints.
in this example it doesn't save a ton of time....but it will save time, and in fredding, time is very important. Try copying and pasting when dealing with more than one ship with identical orders.
You can also use this for warp in cues. and you just change one thing. I am forever using copy and paste. It just saves so much work in the long run. anything redundant can be copied and pasted and modified, remember it, and use it.
anyway...copy and paste isn't a real trick...but a huge time saver when building missions...i generally have 3 copies of fred open at a time and am building the missions three at a time, so anything that saves me from having to build each every damned SexP by hand is a godsend.
you guys are doing just fine.
Good luck. and the Mod Leaders are watching....be afraid.