DL, you can customize the transparency to your liking if you have Martin Wright's DXTBMP tool: Export the alpha channel, make it a bit brighter to increase opacity, then import it back into the texture file. I used these RGB values for the alpha's:
External canopy glass F-104G-0_T.bmp : 17/17/17
VC glass F-104G-0_T.bmp : 0/0/0