xbee and ethernet shields on a same arduino

Hello all…i am building a small perimeter surveillance project for home using two arduinos acting as nodes connected by xbee series 2 modules…one arduino is connected to a PIR sensor that will detect motion and send data to the other arduino via xbee…
now i want the second arduino to recieve the data and turn on an IP camera that’ll capture the motion and upload to internet…i want to use ethernet and xbee shield on this arduino but dont know how…i tried searching internet but it further confused me about ICSP pins and how the some ethernet or xbee shields wont expose them to the other shield…im attaching the picture of the Xbee shield that i am usin (its from funduino.com)…i have yet to buy an ethernet shield… can somevbody please help me out here?..thanks for reading