We will soon be deploying Citrix VDI in Box on Server 2008 R2 using Hyper-V.

This is the first time I have ever done this and just wanted to know the best way to create a golden image?

Is it possible to create a Golden Image from an existing PC by making an ISO or is it better to just install Windows 7 from scratch in Hyper-V and then change the image using Citrix?

Any ideas or advice on this would be greatly appreciated.