il try to give ya a quick idea how you do them
first on the jtag goto system settings and goto network configuration set your ip to 255.255.255.255 (thats so it wont go online) now get another enthernet cable and plug the cable in the back of the same router you are using for your ligit xbox , start up the jtag and mw2 game (dont worry if u think its gonna sign in to xbl it wont beciase of the ip change) then goto systemlink create a game and make sure on the settings you set xboxlive unlocks ON , now on your ligit xbox click on system link and see does it find the game if it does simply just join ;-)


hope this helped you out a bit
[ Register or Signin to view external links. ]

wackey911 wrote il try to give ya a quick idea how you do them
first on the jtag goto system settings and goto network configuration set your ip to 255.255.255.255 (thats so it wont go online) now get another enthernet cable and plug the cable in the back of the same router you are using for your ligit xbox , start up the jtag and mw2 game (dont worry if u think its gonna sign in to xbl it wont beciase of the ip change) then goto systemlink create a game and make sure on the settings you set xboxlive unlocks ON , now on your ligit xbox click on system link and see does it find the game if it does simply just join ;-). Can u do this with two Wireless Adapters Instead??


hope this helped you out a bit
[ Register or Signin to view external links. ]

tp be honest with you man i aint tried this through wireless yet so i cant confirm it works or not but i know cable way works fine ;-)