Can ESXi use shared Block SCSI disks ?
I never heard that anybody uses that ???
Anyway - if you google for "MS cluster in a VM" you will find instructions - most of them are for ESXi or for older WS versions.
See
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1037959
http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-50-mscs-guide.pdf
I doubt that in WS 9 this shared vmdks are stable - they used to work well in 6.5 and earlier
Did you try the iscsi idea with E1000 nics ?
Did you try to find out the reason for those PSODs ?