The key components would be:
Microsoft iSCSI Initiator – to be installed on host to connect to iSCSI SAN.
Microsoft Remote Installation Service – to be installed on host to allow clients to retrieve OS.
link 1: http://www.computerperformance.co.uk/w2k3/W2K3_RIS.htm
link 2: http://www.computerperformance.co.uk/w2k3/services/ris_install.htm
Server – hardware to have the host operating system as well as another server to run the iSCSI SAN software.
Gigabit Switch – dedicated stand-alone switch to connect host server and iSCSI SAN.
Take a look at this document<a href=”http://h20338.www2.hp.com/ERC/downloads/4AA1-1782ENW.pdf”> Hp.com</a>