Okeedokee artichokee!!!
I'll get to these in reverse order I think...just cuz.....
We got better ("are getting"...I probably should say

) with our close-ups....check out the
www.ovrdrvn.com acoustic string change video (on youtube) for more detail on standard tuners etc.
The one-string-at-a-time method works fine IF you don't want to do anything else like clean/condition the fretboard or whatever. Plus, I'm sad to say, I've seen plenty of disasters resulting from this method (as much as the all-off method)!
If you've watched the video, then you know it's about 8 mins long and I am by no means hurrying the string change at all. If I were to guess at what I could do an all-strings-off string change from "in tune to in tune" and ready to play in.....timewise...I'd think 2 to 2.5 minutes.
And that would be without scratching anything (not even the guitar!).........
I'm sure that we could schedule a "How to intonate a Floyd" video...I'll have my people talk to Pete's people....
In all seriousness...we are always interested to hear suggestions for video topics so, if there's anything technique or technical oriented that you'd like to know more about, drop us a line and we'll see what we can do, ok?
Geek time:
The guitar is a 1990 Ibanez RG760WH with a Jem7pbk neck fitted and a Fernandes FSK-401 Sustainer System installed. Bridge p/up is a Dimarzio Evo 2 and the middle is a Dimarzio FS-1.
All the best,
Steve.