Info on the GPS / Video overlay board.
GPS - Garmin GPS 18 serial receiver for PC from - http://www.thegpsstore.com/
http://www.thegpsstore.com/Garmin-GPS-18x-serial-receiver-for-PC-P1842C11.aspx
GPS Software here - www.visualgps.net
XTend™ RF Modem - (2 is needed) http://www.digi.com/products/wireless/xtend.jsp
The XTend is fully programmable and can be set for a RF output from 50mw to 1w. AT 50mw, I get 5+ hours of transmission.
1.2GHz Long Range Video Transmitter and Receiver http://www.vfmstore.com/trc12g.htm
Any video camera can be used, I use the Panasonic SDR-S10. This records to a SDHC card and has a video audio output.
Batteries are from MC Master Carr (NIMH) # 6964T23 & 6964T53
GPS $79.95
GPS Software free
XTend RF Modem (2) $600.00
Base Station Antenna $100.00
Video Transmitter $389.00
Batteries $93.00