Two Cameras At Once!

I finally purchased the equipment to make the two wireless cameras feed simultaneously into processing.I am using the following set up: 2 x Wireless Security Kit from Geeks.com (they work on different channels around 2.4Ghz) XLR8 XtraView USB (composite video to USB adapter using, driver that comes with it) Canopus ADVC-55 (composite video to firewire adapter, no driver necessary)