*.001 files in ART/INTRFACE folder

[Sduibek]

Is there any reason to keep these? I'm not sure if they're used by the game:

DI_BGDN1.001
DI_BGDN2
DI_BGDN2.001
DI_BGUP1.001
DI_BGUP2.001
DI_DONE1.001
DI_DONE2.001