Fire two flashes from your Pocket Wizard Radio Slave with the Paramount PMMY2PC Y-Sync Cord. It consists of 3, 1' long sections. One section ends with a miniphone plug for the Pocket Wizard Radio Slave. The others each end with a male PC sync plug.
If your flash does not have a PC terminal, try the PMMY2HSFM, which has hot shoes instead of PC tips.