Hello, I need to install an external DVD burner to my imac G5. I have bought a DVD_BURN PIONEER|DVR-118LBK from Newegg. However, I should have gotten more info first. I don't have the slightest idea how to install it. It didn't come with any wires or installation discs. What do I need next? Do I need a firewire and what kind? Should I return it and start over? Please excuse my ignorance! Thanks for any help.