Hello,
for some addons who have been made for Orbiter 2006, you have to download some scenes like the one above (1962), but for NASSP, it should run without any problems !
For NASSP, you just need the two modules on the Source forge, if you want to improve your texture for KSC, there is a link just in the Installation page of the site and you can download OrbiterSound too !
NASSP 7.0 has been made for Orbiter 2010 so in any ways, you should not have problems like this !
Sorry if i do some mistakes, i write quickly...