You will probably need a RCA to VGA Converter Box. Something like this:
http://www.amazon.com/VideoSecu-Console-Converter-monitor-1L9/dp/B000V58F9MYou should be able to find one locally at decent Eletronics Store ( like a Radio Shack, Best Buy, Circuit City).
You might even be able to get one at a Wal-Mart, Target, etc. I know I have seen the RCA to RF Converters there, and I think they had ones with different Outputs choices, at one time.