dcpPlayer from
http://www.digitall.net.au is a cheap tool to do inital QC, but really, the ONLY real way to test them right, is to have a full DCI player/projector.
I actually have 3 different vendor DCI players for testing a DCP on to make absolutely sure its fine and no problem occur in the field.
That how the Technicolor and Deluxe do it.
Can you imagine the blow back if you sent out hundreds of copies and 20-50% did not work for some reason...
James