for 1 itunes acount,
we can only authorize
5 pc.
let say i oredi hve 5 pc authorized
and i want to authorize
another 6th pc.
what options that i can chose?

my gf rgster new acount with apple.
whn she try to dwnload app from itune
using the acount,it ask for review and
credit card nmber.

when i open itune acount years ago,
it was not like this. how to rgster itune
account without need to hve a credit card?