Your options are limited due to the vSphere API restriction with the free license. You may want to take a look at ghettoVCB (http://communities.vmware.com/docs/DOC-8760) and/or Trilead Explorer (http://www.trilead.com/) to see whether these fit your needs.
André
PS: Discussion moved from VI: VMware ESXi™ 3.5 to VMware ESXi™ 4