Alright, I've managed to "solve the problem" with crashing. Previously, thanks to StratComm valuable suggestion, I went to the Properties of the FS2 Open and switched it to Win 98/ME compability and afterwards, without experimenting, got your builds, thanks to karajorma. All this solved my issues, including the fact that in de-briefs, the button to pass to the next point (A-to-B) was "dead", it did nothing, so I had to "jump" to the end and see all the objectives. At the end of the game, when I would exit, it would crash. I worked it out with Ctrl-Alt-Del, so no worries. However, I experimented "turning off" the compability thingy and it no longer crashes at the exit. Unfortunately, the de-briefings are back to the beggining, with having to jump everyones to the end...
Just thought that it would be best if I left this here too...