Creating decals from non-square textures?

[Tearl]

are you CTRL+drag the material into the scene and choosing "Add Decal:"? If you put a decal actor in the scene from the actors tab, I think it just expects a square texture.

[systemic]

Is there a way to use non-square textures (256x1024, for example) as a DecalMaterial? When I try to use one, it looks bunched up in the Decal Material Editor [and in game], as if it can only work with square textures. Is there a way to fix this?

Thanks