hehe, been there. I was going to make it raise by a small system of drawstrings from laying on the dash. Its a good idea, except since its projecting onto a film form the opposite side, the whole world knows you have something on in your car, and is illegal in my area 9since it looks like light is being emitted from the dash as well). I was thinking a roof top projector, and then came the point "how?" Well, my car is small. If it was an SUV or mini van, i'd hit this completely differently, but i like my economical compact sports cars.

I haven't had the curvature of my windsheilf be a problem, just the inverting of the pictures isnce it does produce a mirror image.

Also, i had a company, da-screen or something, do the calculations for me. You only need about 350-450 nits to appropriately illuminate the screen (thier holoscreen), if i remember correctly. It won't take too much do iluminate the screen in the day time at that distance, esp if you use an LCD. Filters that you'd need...i don't know....the resident optics guys will lead you better in that respect.