1 free domain credit... how to use?

so i just bought the special 1 year hosting plan at "9.24 for your first year!"
and i was wondering how i can register a .org domain name and use the dreamhost credit.
if i go ahead and purchase the domain through dreamhost will they reimburse me?
why can’t i select it as an option of payment?

under Domains Registered it says:
(0 registered, 1 free on this account)

how do i use the free one?

when i first registered i used a .co.cc domain name

you have to pay for it now and get credit when then 2 week trial is over.


In other words, you should end up with a 71 cent credit in two weeks if you sign up for the special and then pay for the domain registration up front for $9.95.