Is there some simple script or mod that does nothing more than just unlock all areas/maps of the game?
As I understand many locations are locked until the actor receives some info portion. So it might be sufficient to have a script just throwing all responsible info portions for unlocking the X-Labs and the like.
I could do that myself but am fairly sure this has been done before, so why re-invent the wheel
Something considered impossible is only something that hasn't been done yet.
yeah man, the ZRP Teleport does that. Just Esc-T then choose freeplay (or any level later than the one you want to go to) and choose Equip Only. Then Esc-T again and choose the level you want to go to and choose Teleport Only.
You can comment-uncomment infoportions in task_test.script, look into infos_table, the infoportions are roughly in storyline order.
The script also spawns for you some nice stuff according the map where you currently are.