1. Enpoint 5.0 supports with ESXi 4.1 U2
2. Virtrual Hardware verison 7 is supported on ESXI 4 U2.
3. Only thing how do i install vmware tool 8 on VMs in esxi 4. u2.
Manually downoad vmware tools on verions ESXi 5.0 patch 1 from the below link
http://packages.vmware.com/tools/esx/5.0p01/index.html
Refer the below KB for iinstalling vmware tools manually on the virtual machine.
Vmware tools 8 on virtual hardware version 7 is supported.
http://kb.vmware.com/kb/1018377
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Thanks & Regards
Dharshan S
VCP 4.0,VTSP 5.0, VCP 5.0