All you gotta do is this,d/l it.
Then it will give you two options
-Sign up
-or you already have it
,click the 2nd one,(that you already have netflix).
You will recieve a code soon there after words.
Have the person that actually has a netflix account,
type in that code on their netflix account.
It will assign their netflix account onto your xbox.
I believe 5-6 xboxes can be activated this way under one netflix account.
No extra charge,may i add.