Currently Being ModeratedNov 26, 2012 10:55 PM (in response to J & F)
That's something that you would do in the software you're using to author the DVD.
Currently Being ModeratedNov 27, 2012 7:53 PM (in response to J & F)
Use iDVD. Set it to PAL.
It is available on disk as part of iLife 11.
IDVD is a wonderful piece of software and well worth the low cost of $40. (works with all Mac OS 10.5 and newer.)