If the DVD player has a built in Dolby Digital decoder it should have the 6 channel analog outs (FL,FR,C,SL,SR,SW). Also if the DVD player supports DVD-Audio or SACD it definaltely will have analog outputs for 6 channels.

My Pioneer 563A has those plus an extra set of FL and FR analog outs specifically for 2 Channel music because it decodes SACD.