Since I lost my key I will post here. Close and PM me if I can't post here...
I just downloaded the last patch for SS06 that had that other tug. After I was done I got on there and made a mission with it. In the process I noticed the custom missions edit/make folder was empty but I know I had some..
Once I was done I went to missions where it should be and it is blank. When I hit start mission this popup and flys over the port of Rotterdam :S
(http://img211.imageshack.us/my.php?image=shipsimrv0.png)