Battle Isle: The Andosia War

There is native support for most widescreen resolutions, selectable from the regular configuration frontend.

No manual aspect ratio support. Selecting a resolution with a different aspect ratio will just reduce or increase the amount of vertical space being cut off.

The game has some animated FMV cutscenes, which are windowboxed by default even on 4:3. In higher resolutions, the FMV size remains the same while the black borders grow. There is an option to switch the cutscenes to fullscreen which is NOT accessible from the configuration front-end but just from within the actual game. If set to fullscreen, FMV cutscenes are not aspect corrected and stretch on widescreen resolutions.
However, the cutscenes violently refuse to have screenshots taken of them - even with Fraps I was unable to get anything out of this.