other than hiring Shane (which is a good idea if you can afford it) the process can be as easy or as difficult as you would like to make it.
the easiest route its to shoot, edit and master your show at its native DVCPRO HD resolution, and then create a letterboxed NTSC dub directly from the master ... most HD decks have the ability to output in SD simultaneously.
for best quality, take your HD master to a facilities house and have them make you a PAL SD copy using a Terranex or other high quality hardware standards convertor