I ran into that same kind of issues basicly what was happening for me was that i did everything correctly but the install did know what install images to list so i download this program called gimagex then I ran it then I clicked on the tab change and then located my install.wim file and then selected witch version I wanted to fix so for example vista ultimate then I Typed Vista Ultimate SP2 in each line and selected the SKU flag Ultimate and then checked the box Boot and Check then clicked chage. I let it run and then did the same thing for each version I had in my install.wim file so in my case I had to do it for Ultimate, Home Basic, Home Premium and Buisness after that it worked for me. give that a try that could fix it.