This is a very cool tool to configure the MS core server by a GUI. I know, this sounds strange, but it makes it pretty fast to use core servers for everyone not too familiar with PowerShell etc.
It is freeware and published under the Microsoft Public License (MS PL).
On the website you'll also find a version for 2008 R1, as this one here is ONLY working with R2.
On the website you'll find the download as .iso (for direct mounting in VMs) and as .exe for use with physical machines.
Here's the website: http://coreconfig.codeplex.com/
Hope, this helps you to use the Cores!
All the best,