Okay, so it's possible, now, the final part.. Is it possible to incorporate some sort of check for phase jumping to see if a certain variable is true.. Basicly, what i want to do is:
1: Disable permanent phasejumping on capital ships. = Check
2: Make an ability to temporarily enable phase jump for x-amount of antimatter. = Check
3: Make it so that while phase jumping is available, the ship can only jump to a planet with a phase stabilising structure/ability active. = How? If at all possible?
I have a horrible feeling that the last one might be tricky if not impossible, any help would be appreciated, and many thans for the speedy replies so far 
/vap