Well a single server deployment of WbH 4.5 can be done. There are some gotchas one has to be aware of and the error given in this thread is a major showstopper - but can be worked around. Take a look at my blog post at: http://www.vinodunny.com/blog/post/Fix-for-MSI-Error-1603-in-WbH-MPS-Deployment-on...