Setting Up Windows and SQL Clustering on Virtual Servers

I have been working my way through How to Configure Virtual Server 2005 in Order to Setup a Test SQL Server Cluster that Brad has posted on the site. I need a point of clarification around the shareddata.vhd and the clusterquorum.vhd files. As soon as I set the SCSI controller to Share SCSI bus for clustering it only allows me to attach a single drive to the controller. Do I create one large VHD attach it to the SCSI controller and build my data and quorum logical drives inside that or should they in fact be two seperate VHDs and in that case which controllers should they be attached to? The document talks about creating both VHD's, but only shows one being attached to the VM.
Thanks for the help.
Michael

See this article for another perspective.
http://www.microsoft.com/technet/prodtechnol/virtualserver/deploy/cvs2005.mspx