Most recent version of DSS addresses the iSCSI ID issue with Virtual Iron (DSS version 5._49). We will have a new DSS Demo-CD version very soon, we hope to have this ready before end of next week. Manual is downloaded from the GUI interface of DSS.
The reason for the issue with Windows 2008 cluster is the persistent reservation that is needed. We have not tested with Hyper-V. But I know that someone on the forum did mention it working.