You will probably want to configure 2x73 in RAID 1 for VMware, then 4x300 in RAID 10 for the storage/VM's, but you must configure RAID before VMware can find any disks to install to.
I have a similar issue.  My BIOS is 2.4.3.  I can't install VMWare ESXi4 because it is giving me an error stating that it can't find a destination to install to.  I have gone into the bios and the drives do show up as PD, but nothing under VD.  I can't get an OS to install either. Any ideas?
VMware no disks on PE 2950