re: An Idea for saving Hubble
The Soyuz carries 3 cosmonauts. A shuttle flight to the HST involves 7 astronauts.
From Kourou, Soyuz spacecrafts could reach HST's orbit, but that won't be possible for the next 5 years and I'm not sure the height of the HST is reachable for a Soyuz. They never went that high.
But there's another thing: HST repair missions always involve 4 spacesuited astronauts, each one with his own spacesuit.
In case of emergency, it would be easier to save astronauts than when only 2 spacesuits are available, like it was the case on Columbia's last flight.