If you want to try out some multipath configurations, VMWare server has again a nice feature where you can make a vmdk available over more than one path.

I have used this to try out different multipath configurations on several distributions.This can be achieved by creating a virtual machine. Once the VM and disk is created, you can add or modify the disk.locking = "false" directive to the multipath disk stanza in the virtual machines vmx file.
Here is a sample:

scsi0.present = "TRUE"
scsi0.virtualDev = "lsilogic"
scsi0:0.present = "TRUE"
scsi0:0.fileName = "mpath_disk.vmdk"
scsi0:0.mode = "independent-nonpersistent"
scsi0:1.present = "TRUE"
scsi0:1.fileName = "mpath_disk.vmdk"
scsi0:1.mode = "independent-nonpersistent"
disk.locking = "FALSE"