I have added a ton of new covers big thanks to CG who helped me get them together, they are for the following items:
CD Covers:
-DC Space Invaders
-DCGenerator
-DCLinux
-DreamPAC
-DreamSNES
-MameDC
-MamedDC
-NesterDC
-Odd-DC
-QuakeDC
-Sintendo

DVD Covers:
-DC64
-DCGenerator
-DCS2600
-DreamSNES
-MameDC
-QuakeDC
You can pick them up in the DC Covers section of this site.

If you have any covers not yet listed at the link above, please email them to me here. Make sure the file names are in the format as follows: YourName-ItemName-Section.extention
YourName = Your name
Item Name = Item on dcemu that it is for
Section = Front, Back, Side whatever.
extention = .jpg, .gif