If you are trying or wondering if Windows Azure supports Windows 7, Windows 8 or other OS via a Hyper-V on a 2008 VM image uplodaed to Azure you will realise you cant do this.
The operating system that is installed can be one of the following:
Hyper-V cannot currently be enabled on the VM images to allow you to install operating systems like Windows 7 or something else.
You will fail on step 2.
You will get something like this: