The oven will melt them. You can either put them in a hot tub with hot water and wait (a lot) for the adhesive to soften, and keep trying to open the headlights, or you can user a powerful heat blower (as the ones you use to dry your hair, but more powerful). The second method was used when I had my headlights done: http://www.aveoforum.com/forum/f103/...an-aveo-12610/
And yes, Seregga's projectors probably have HIDs.