Hmmm… this is going to be a tough one
Laptop drives have their firmware tailored to the manufacturer; in this case obviously Philips. So any region-freeing firmwares from elsewhere might make the drive inoperable.
According to this threadon [I][B]rpc1.org[/B][/I], the drive is actually manufactured by Quanta Storage Incorporated (QSI): model SDW-085 and who seem to be notoriously bad for providing updates.
Unfortunately I think your only reliable option is to use something like AnyDVD from SlySoft: a system driver with a minor function that removes region control from most drives. You have to pay for it but it will remove pretty much all DVD copy protections and enable you to back up your own DVDs. It comes well-recommended here and elsewhere.
Maybe our resident [B][I]rpc1[/I][/B] expert [B]chef[/B] can give us a better insight …