FC, iSCSI, and NAS configuration?

I am using Windows Server 2008R2 as a domain controller to 2 other servers and would like to use my Dell Powervault 770N as my NAS for data storage. I have FC that I would like to implement between the servers and the NAS (as an iSCSI target). I am brand new to this world; is this possible? I am trying to find a free download for my NAS that will also be able to accommodate this scenario. Any help would be great!

Please be more specific about what you have (hardware) and what you are trying to accomplish...

My Domain Controller (Windows Server 2008R2) is a PowerEdge 2850. Web server is a PowerEdge 1850. WordPress server is a PowerEdge 1750. All Dell. They were donated to my school so I'm not entirely sure which internal packages they have. I have a 3COM Office Connect 8-port managed Gigabit switch, and my HBA is a 16-port McData 4400. I am also in the process of installing OpenFiler 2.3 on the PowerVault 770N (NAS).