No unfortunately you can't service a Vista image with the 7 WAIK. At first, I got around this by using Win7 Tools on my main Server and put Vista Tools on another one. Eventually I ended up putting my WinPE 2.x boot images into retirement and created all new WinPE 3.0 images for deployment. But no, now I have Vista images (or even XP) that I can't do anything with besides regular image maintenance like mount/unmount and export/delete. I cannot put drivers into Vista images, so if I need to make one I have to use my unattend DVD each time. I still have some generic SP1 images I can use, but early on somehow I corrupted my Vista Ultimate image with DISM and had to delete it. As far as my job goes, Vista was never very popular, and once Windows 7 went RTM no one wants Vista, so I kinda lucked out. Its actually funny now, if I see a system come through with Vista on it, I go and make sure someone didn't make a mistake!