McNeil_IT,  The easiest way to install 2008r2 on the server would be using the Lifecycle Controller. If you boot the server and hit F10 at start up, you will access the Lifecycle Controller. From there select platform update and run this OS Driver pack. This installs the drivers need for the Nics, Raid Controller, etc. Then go back to main menu and select OS Deploy and then select to Deploy OS. When you you get to where the OS asks where to install, you should see the Virtual Disk you created in the Raid controller prior to OS install. Select that virtual disk and the OS should install.  Let me know if this helps. 
Hello guys. can anybody  assist me on how to properly install a fresh copy of windows server 2008 r2 32bit O.S in PowerEdge R720. this is the 1st time i bought this server. thanks
PowerEdge R270