Just hit start when it says so and then go to cooperative and make sure that you have 2 profiles that have XBOX Live. WARNING THIS DOES NOT WORK!!! =P
Nevermind, wasn't signed into xbox live before i tried to play it XP
for co-op/non xbox live only 2 profiles at a time (on the same xbox) can be used, though for xbox live, 2 teams of 5 play each other, and on horde it is just one team of 5
You're going to press the middle Xbox button on your controller, then go to Settings>System Settings>Memory>User Profiles. then select the profile you want to delete and select Delete.
Yes you can
If you buy something on XBox Live, games, add-ons, (everything except Avatar items) will be shared with all the profiles on that xbox, you can allways re-download it for free on any other xbox or location you are in, but will need to sing in in your windows live ID
System link is a way to play with other people on the same network as yourself, so no you do not need live to system link but you do need to be on the same network
Microsoft does not sell regular Xbox Cards.. Just says "XBox Live"
You have to create multiple profiles and on each one do what you did when you first created an acount. But the email addresses have to be different (so do the gamertags) And you can not use your gold on the other profiles, you would have to buy a gold membership for each of the additional profiles.
its the same as the one for the 360, its not xbox 360 live its xbox live thus working on both consoles.
No , you can only connect with people that have the same system as you .
It depends if you game supports a same system multiplayer online feature, like Halo 3. If you game does support that feature then you will probably need to sign everyone in except for yourself as a guest profile for xbox live.