Yes, just select the profile and choose "Join Xbox Live." You may have to change your gamertag, but your Gamerscore will stay the same.
yes, you can play DLC that was downloaded on a Xbox LIVE profile and play it on a non Xbox LIVE profile
You can do this on Xbox.com or you console. For Xbox.com go to my Xbox and click on account. On the Console go to My Xbox and click on your profile and choose profile to update it.
Yes you have to have Xbox live to update your flash drive.
You cant sell a Xbox live profile.
To get a Xbox live membership, you need to register. Your profile must have been registered to go online.
Update it
Firstly, get your network status on the Xbox 360 network settings. This will tell you if connected or not etc. If you know its the update, you can go onto the xbox website and download the update manually. There will be a installation guide to apply the update.
yes.
No
you go to
It is a motto of sorts which everyone on Xbox Live will be able to see if they look at your profile.
Nope, must have 2 live accounts