just give it levels\a10\cryo glass, that will make it entirely invisible
but if you want to make it look like actual glass, try finding the bitmap (i think... ) of the warthog's windhshield
ASPARTAME: in your diet soda and artificial sweeteners. also, it's obviously completely safe. it's not like it will cause tumors or anything. >.>
always remember: guilty until proven innocent
If you're making it into a stationary turret, you'll also need to swap out the shaders for the dashboard instruments. They are hidden away inside the [schi] Shader Transparancy Variant tag.