I'll assume your thinking "OMG IS THIS REALLY POSSIBLE???" so let me tell you yes, it is possible, and it can be done pretty cheaply and easily. If you want a HUD that is 'static' in other words, it doesn't change, just for looks ect, then go HERE. If you want one that actually displays some info, and can change, than this is the thread for you. I'll make this no secret: Custom electronics for controlling the screen are difficult. If you already have a screen on a device that shows what you want, then just hack 'n' mod it till the screen is in the right place. If you know a good bit about microcontrollers, than this will be a lot easier. If you don't have any experience, and you still want custom electronics, I suggest you start learning about microcontrollers with Arduino. They are more than willing to help and it is simple and easy to use. On the arduino forum, look pm me, my username is the same as it is here. I helped a friend who had the halo reach helmet with the sensor thing on the side. We took the guts out of a cheap point and shoot cam, and put the actual camera in the sensor, and wired it to the camera's screen which was the basis for the HUD. this is prob the simplest way to create a hud setup, and add options like night vision cam, ect. In the following pic: green - screen blue - lines showing the light reflecting onto the faceshield purple - mirror the golden area on the faceshield is where the hud will be projected, adjust the mirror's angle to change this. AND NOW FOR THE MOMENT WE'VE ALL BEEN WAITING FOR: THE CRAPPY PAINT IMAGE!!