The Firmware Page

Hi all,
I apologize in advance for this post - I tried to find the solution to my "problem" searching on the forum but after 2 hours surfing I realized that I'm totally lost (probably since I'm not a computer genius).
I'll be really grateful if you could give me a hand.

I have a MacBook Pro 15"
Intel Core Duo
1.83 GHz - 512 MB/ 667 MHz

MATSHITA DVD-R UJ-857:

Revisione firmware: HAEA
Interconnessione: ATAPI
Supporto masterizzazione: Sì (rilasciato/supportato da Apple)
Cache: 2048 KB
Legge i DVD: Sì
Masterizzatore CD: -R, -RW
Masterizzatore DVD: -R, -RW, +R, +RW
CD con protezione "buffer underrun" nella masterizzazione: Sì
DVD con protezione "buffer underrun" nella masterizzazione: Sì
Strategie di scrittura: CD-TAO, CD-SAO, DVD-DAO
Media: No

Travelling from the US to Europe I have changed 5 times the regional code of the DVD and now it's locked into region 1.
Some friend told me that there's a way to set a region free code and that's what I'm looking for. Unfortunately I'm not really sure that I've understood what I have to do...

Anybody can help?
Thanks!

Locked is locked, you cannot do anything to revert this.

if you read this thread, it will tell you the region free available, which includes your revision

viewtopic.php?f=30&t=43082