You know someting that could work lego, you could integrate the updates into the lowest sku and export it many times and then use dism to convert the next higher "target edition" (same way method used to turn Windows 8 Pro to ProfessionalWMC) Integrate the updates into Starter (for x86 iso's) or into Home Basic (for x64,) then you export it multipple times, mount each image and covert & rename them BTW off topic but you should see this new feature in Windows 8, its very, very cool you should