let me give you a quick explanation of the situation:
Juve wanted to sign Mutu, but we couldn't register him coz we didn't have space in our extra- comunitaries list (we had all the extra- comunitaries places ocuppaid), so what we did is that we ask Livorno for a favour..
Livorno sign the player, and agree to pass it to Juventus, in exchange Livorno will get two youngsters next season...
Now about the fact that we can't use him till may... well thats why Mutu didn't cost anything, coz if Moggi waits until may, then other clubs will be after him and probably we will have to pay alot of money to hget him...
Now that Juve has loan Tudor, we have space in the team to bring Mutu, he can't play till may, but he can practice with the team...
Oh, and there are people who think that we sign Mutu to use him to bring Cassano to Juve....