Quite often you find yourself looking for that tool you know exists, but can’t remember the name of. This morning I was in such a position.
Setting up a Windows Server 2003 x64 Virtual Machine under HyperV, and upon booting it you have no network. And only on Service Pack 1, so you can not install the Virtual Machine Integration tools (and give you the drivers). Catch 22 :)
So, off I go, and download this handy utility: http://isorecorder.alexfeinman.com/Vista.htm. Install, create ISO, mount it under HyperV and bingo we can install SP2 on the VM without difficulty :).
On the subject of creating ISOs, another handy tool for you kit is: http://www.minidvdsoft.com/isocreator/