I found this helpful when planning a New Install of VSphere or vCenter.
May 27, 2009
This article provides quick reference to the information needed for a trouble free installation of vSphere ESX 4.0 and vCenter 4.0.
Full Post, http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1009080&sliceId=2&docTypeID=DT_KB_1_1&dialogID=21124828&stateId=1%200%2021132008
Lot’s of good info here. I wanted to post it as a reference.