Yes you can transfer your money to Poker Stars, but first you have to pair your Full Tilt Poker account with your Poker Stars account.
After that you can be eligible to transfer your money.
Correct.
However there was a change at this politics.
I play at FTP and PS and use to transfer from FTP (where i use to win) to PS (where i use to lost it, hehehe).
Yesterday, i tried to transfer again some funds from one account to the other (i had already made it about 6 times), but was not allowed to it, so i sent a email to support and here it is the answer:
"...
However, as a new security measure, we do not allow players to make any kind of Transfers or Withdrawals from their account, if they have not yet made a deposit on our site.
..."
So, from now on, in order for you to make any transfer or withdraw any cash, you need to had made first at least one deposit.
I do not know about you, but to me, this is bad news, as i only use to cashout money from poker accounts, not to deposit at it....