15th December 2005 EDIT: this zip is a little outdated by a new package that I uploaded here (NASA VSE SC v1.0):
http://www.orbithangar.com/searchid.php?ID=1957
The current SRB Launcher SC v1.0 will remain online until I find time to update and correct the documentation (pdf) and include it in a new NASA VSE SC zip (v2.0?). Related with NASA VSE SC, click next to see development pictures: http://www.flickr.com/photos/simcosmos/
Original SRB Launcher v1.0 description (08/01/05), next:
Addon based on ATK Thiokol's SRB Launcher proposal for NASA's Exploration Missions. Please do read the available documentation about this addon! ATV concept included... Have fun!