Conjunction Junction – how will this function???

Greeting and Salutations!  I recently acquired a Theta Digital Casablanca II with 2 Xtreme DACs from fellow Audiogoner maceo23 (Extremely Nice and Professional – 100% recommended).  Since I don’t have a spare $10,000 or so to upgrade the machine, I am left puzzled.  My Oppo, cable box and plasma monitor are all connected via HDMI connections.  Since the Theta does not provide for such a connection, what would be the best way to incorporate the new machine into my rig?  Thanks in advance for any suggestion and advice!!