I didn't really know where else to post this. I wanted to contact someone at erogedownload directly but couldn't find any contact info for that. I made a walkthrough for Kara no Shoujo 2 that gives you all the endings and map choices that give you all the sex scenes. Mine doesn't take into regard places to save the game so I think for the actual walkthrough of the endings this would be better: Kara no Shojo (Shoujo) - The Second Episode walkthrough (Mangagamer) - Otaku Lair
That walkthrough doesn't give you all the sex scenes though.
For my walkthrough:
.doc: Kara no Shoujo 2 Walkthrough