When you extract the files to Orbiter, do you have the "Use folder names" and "Overwrite existing files" options checked? If you don't, check them, and then try extracting the files again.
As for the files, Kaito is looking for this:
[ame="http://www.orbithangar.com/searchid.php?ID=1328"]Shuttle Crawler Rollout ver9[/ame]
[ame="http://www.orbithangar.com/searchid.php?ID=2490"]Ultimate Space Shuttle Experience[/ame]
[ame="http://www.orbithangar.com/searchid.php?ID=1828"]ESA Nerva Shuttle Project Freedom Part2[/ame]
The Nerva ones are from an outdated version of Orbiter, which is probably why they don't work (also, you only posted part 2, did you install part 1?).