What I do on mine is rip it to the HD and then play
it from the HD.
Not on a MacBook you don't.
Nor a recent iBook or PowerBook.
That's the whole point.
The matSHITa uj-825 and similar models do not allow this, unless you change the Region code, which you can only do a few times.
After that, you can no longer watch OR rip most DVDs.
In Canada, almost all DVD's are region 1, so the few changes may last a long time, for locals who don't travel.
In Mexico, and here in Taiwan, Macs are a joke. They just don't work.
No one except a few misguided foreigners uses them.
Only the biggest cities even have stores that sell them.
Here is an example:
The BlockBuster in Pachuca Mexico rents both Region 1 and Region 4 DVD's. My wife's new iBook lost the ability to watch DVD's after one month in Mexico. Still no firmware upgrade after a year. DVD's here are mostly Region 3 with some Region 1. Her iBook is glued to Region 4.