or goto
http://www.darktown.to/ itīs a german page but i think u will be able to handle it, the advantage of this page all the DVD coverpictures already have the right size that fit to a DVD cover (27,3cm X 18,3cm) so u just have to print them out!
At
www.cdcovers.cc u have to alter the size of the cover otherwise it will not fit into a normal DVDcover