by 'apple dv-pal' i assume they want a quicktime (.mov) encoded with the dv-pal codec. to get that, from the render queue click the output module, set the format to 'quicktime' then click the format options button and select 'dv-pal' from the video codec dropdown.
as for 16x9 in an sd codec, the frame size for all pal dv media is 720x576, whether it's 4x3 or 16x9. the pixel aspect ratio is what determines if it should be 4x3 or 16x9. the easy way to have this set up correctly is to use a comp with the correct dv preset. what i'd suggest is creating a new comp with the 'pal d1/dv widescreen' preset, then drop your current comp into that comp and choose layer>transform>fit to comp. the comp will likely looked squeezed (or anamorphic), this is normal. if you want to view it in 16x9, there is a toggle button at the bottom of the comp viewer window that looks like a rectangle with a 2-headed arrow above it, click that to toggle between square pixel preview and non-square pixel preview.
then render that dv comp using the output module described above.