personally i'd say for a DM500 the best setup method would be 3 easy steps.

step 1. open wheelie bin lid
step 2. throw said DM500 into said wheelie bin as hard as possible.
step 3. buy a decent receiver you cheap arsed git. the DM500 aint even a real DM any more, they ceased production 3 to 5 years ago. your just buyng some god awful chinese clone.