Good point. haha, i didn't know if it were possible but i had a few ideas on how it might be done. i.e. switch on the wires exiting the ballast to the lights. I know that would work, but that wouldn't retain my stock switches. unless i could come up with a way to wire my stock high beam toggle to that switch. but basically that would allow me to wire my high beam ballast to my low beams which would hopefully charg my high beam ballasts allowing for immediate light. Ideas?
Really the only good way to do it is to re-wire the board, and if you dont have some serious electronic experience your not going to be able to do it. The only other way is a relay on the outgoing power wires to the light, but because the amps are so high I doubt you will find a suitable relay thats not industrial and a PITA to get (be it actually getting or cost). Then you have to remember the power your playing with, this is why I really dont recommend it. If you get hit by the amp'ed up juice your in for some serious risks. Im pretty sure those put out enough to cause a heart arrhythmia, or worse.
Simply put, its not worth it. Normal high output incandescent bulbs are PLENTY bright enough for any highbeam. Couple that with your already HID low beams (that will actually project further due to the lack of a true HID projector, but subsequently blind people) and you have enough light. If you REALLY wanted HID highbeams the only way to go is buying a Bi-xenon projector.