[Quall999]

If you have a router, skip the 1st step:
[1.] Load up avalaunch on both xbox's. Go into network settings and make the IP's static. And not the same.
[2.] Reset if you did step one. If not, load up avalaunch on both. You only need to control 1 xbox, so just leave the second one be after launching avalaunch.
[3.] Go into the file manager. Click the right window and press start. There should be an option like "switch to remote connect". If you click it, a list of avalable networks will appear.
[4.] The other xbox should appear there is it loaded avalaunch. If not, you can pres start and add a new connection (or there is an option in the network list). Click the new connection and you just need to input the IP, Username, and Pass. It should connect.

that was off the top of my head, since someone is playing my xbox at the moment.