I didn't make it!
This is gonna sound like a stupid question, but exactly how do you target subsystems? I honestly can't understand the in-game instructions... I know how to turn the targeting on. I know you wait for the phaser lock to turn into a circle. I know you hold A while firing, and I see the icons... but then what?
When subsystem targetting is on and the little icons pop up around the ship, hold down "T" and a cursor will come onto screen, use the cursor to select which system you want to target. Enjoy
Remember: to activate it hold shift and press T.