Well, for sure the Max Headroom stuff was done by editing. If you remember the sound stuttered in time with the video. If you are looking to do something like that in fixed places, editing would probably be the easiest thing to do. But if you wanted to do something like that real time, you may try using samples and trigger them manually.
Alternatively there is something that doesn't exactly do the Max Headroom thing but something similar. The plug-in is called [[url=http://[/URL]="http://scuzzphut.pa…"]phutboyslim[/]="http://scuzzphut.pa…"]phutboyslim[/]. It's more of a beat slicer but pretty neat.

For the Darth Vader voice, first get James Earl Jones. :lol:

I'm not exactly sure...I'll need to throw on the DVD and listen to it a few times. I would guess that they probably used a very short delay of just a few milliseconds and some creative EQ to give it that "talking in a helmet" sound.

a granulizer can do the stutter effect with no problem.
FLstudio's granulizer has a preset called stutter, almost the exact same thing. I'm sure with a bit of tweakage you could get it there.

Phutboyslim can do the trick.

My favourite tool though for this sort of thing + filtering would be Memory from whitenoiseaudio(freeware, midi control).

http://www.whitenoiseaudio.com/memory/

Memory is an effect which allows you to sample and remix your beats or other material on the fly. It works by allowing you to loop the input it recieves and also change the length of the loop. To use the Memory, it's best to set it up as an inline effect (or as a 100% wet send). Just start playing some input into it and click on the pad. The pad allows you to control the length of the loop and also the cutoff of a filter on the loop. Pad motions are sent as automated parameters, so you can record those parameters in your track as you would record knob tweaks on any synth. Memory can also be triggered via MIDI notes if your host supports sending notes to effects. The usable MIDI range starts around C2 or C3. Each semitone above that represents a different loop value.

Also check buffer override by destroy fx, its midi controllable as well.
http://destroyfx.smartelectronix.com/

Buffer Override can overcome your host app's audio processing buffer size and then (unsuccessfully) override that new buffer size to be a smaller buffer size. It makes a lot more sense if you just try it out and hear what it does. It can sound like a stuttery vocoder or a stuck beat shuffler or many other delightful things. In certain hosts, you can also "play" Buffer Override via MIDI notes and even sync it to song tempo.

Cya

pr0gr4m is correct the wide stutters are a result of picture editing, the rest we used an Eventide H300SE Harmonizer. I'm not going to give up the settings!!!!
Hey thats all we had!!!

Regarding plugins, see if any of these might work:
http://www.soundtoys.com/products/index.php

The SoundToys boys designed the Harmonizer

Oh and the H3000 can be replicated here:
http://