Hi Janson,
this is germany calling 😉
1.) yes, 720×576 is the SD-PAL-equivalent to NTSC and it will be anamorphic.
2.) you´ve told that the original material is 1080p29.98 so there are a few ways.
a) using apple Cinema Tools:
if you would go that way, you will change the meta-data of your film from “played at 29.98fps” to “played at 25fps”. that will cause a slowdown of the film and the audio, too. so it will be longer! this could only be done with progressive material.
NOTE: it will change the frame-rate from your source-material, so you better dublicate it first!
b) using apple Compressor:
with compressor you can create SD-PAL direct from your 1080p29.98. for that you need to create a new export-setting.
you need to select the 3rd. option (frame control) and turn it on. then you can set resizing and retiming.
if you need to have the same lenth/duration this would be your best choice.
now to your codec: if your customer expect good picture-quality DON`T use the DV-codec, that´s to bad. I would use PRO RES HQ instead or 8bit uncompressed if you have enough disk-space.
PAL SD-material normally has upper field first
NOTE: using frame-control will result in long processing/rendering-time.
cheers
danny