This post's title (at least most of it) was lifted from Beyond Apollo, which has just moved from Blogger to Wired Science Blogs. David Portree's post has a detailed description of the 1993 study that originated from the Exploration Program Office at JSC. I also swiped two NASA photos which depict the Phoenix Moon Lander being boosted by a Shuttle-C and in flight. David's article also has more photos of the concept. Enjoy!
And, just for R2K, I grabbed a photo from an earlier post. Looks a little like a Performance Rocketry Gizmo.