Fritz - here's a quick rundown of the parts used:
ROTS - Plo Koon head x2, neck post, hands
ROTS - Pilot Obi Wan Arms
Saga - Imperial dignitary collar
Saga - Capt. Typho tunic/skirt
And of course the legs and torso of the firespeeder pilot.
As for the hood and cloak, it's a ROTS Emperor hood, cut open on the front (the little clasp), and the 500th Vader cape. To make the hood fit right, I had to cut down the extra head a bit in the back, but the hood actually is sculpted as to look like it would be fitting over his natural contours. Since it's a ball joint head, it makes for an easy swap to put the hood/robe on.