@SoD: Yes it is possible to create a component just like you are describing. I believe they did just that in the SE4 B5 Mod. Sounds to me like you thinking up your own mod. You may need to put together a team to help you.
I could script an event like that; however, it wouldn't close at the end of the turn. It would have to be one event to open and one event to close. And then it might not close the one that was opened. It could close any wp anywhere. The path problem isn't just the AI. Next time you play a game watch the quadrant map. When you see that two system (system A & C)that you have entered are connected by a third system (System B) you haven't explored tell a ship in system A to go to System C. Even though you don't know where the wp are chances are good your ship will path to the hidden wp cross the system to the other hidden wp and pop out in system C. So you see the problem is all around, not just with the AI. AI and players use the same path finding code when giving their ships orders.
@Derek: I understand, my wife is a CPT in the Army and I am ex-Army so I know how that goes. Those errors are perfect. If you can send me the names of the ones in question I will proof read them again. Wonderful I am expecting more of those type of errors than any others. For the "Gun" weapon line that is right. In combat they look like direct fire weapons because I wrote them that way. However the effects they have are those of missile weapons. All a Sprint missile is in SF is a missile which is traveling to fast for any form of PD to stop. It is still a Nuclear weapon and against a target with no working engines has the effects all nuclear weapons do. Basically just what Kana said!