OK, I'm confused here. The yt vid shows the person installing SQL 2008 R2 Developer ed, which is possible as Developer ed can be installed on a wide variety of OS types (Server and Client OSs).
So, david.dartnell, have you managed to install SQL 2008 R2 Enterprise ed on your PC running Windows 7?
I know you mention it, above, but I'm really interested to confirm this is Enterprise ed and not Developer ed.
Edit: changed mention of Hardware to mention of OS types.