You can already open a program like that in the offline mode. If I recall it's in the arena settings area, but I don't have aces high on this computer (my comp is in shop), so I don't have a direct pathway to what your asking for.
But this is already in aces high, just a different appearance to it, it's a check-box feature in the arena settings, under one of the tabs. Makes it so when you target a plane (in offline mode only), via the tab key, it shows where to lead for your primary and secondary guns based on the distance you are from the target.
Hope that helps