Thanks for the welcome! :)
Both problem was fixed in nGlide 0.96.
I just tested nGlide 0.96, the aspect ratio is okay now but the widescreen resolution doesnt bring the desired effect.
These screenshots are from my laptop where I tested it (I'm not at home this weekend so no big widescreen), but the res here is 1280 x 800.
nGlide with 1280 x 800, sync aspect ratio to screen option:
same but with 4:3 aspect ratio:
My point is, appart from that nGlide causes weird overlay problems on the light texture on the ground, that this is not the desired effect. What I mean with widescreen actually is a full image, not squeezed and without black bars. Is this possible at all?