Especially when you consider that 'documentary' is probably one of the most difficult techiques to present, and one of the easiest to make a mess of, then this is, frankly, a work of art.
You should consider presenting this professinally.
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.