HP aren't providing a customised image for 4,1u3, so I can't use one from HP (not for u3 anyway).
"HP will support VMware ESX and ESXi 4.1 U3; however, HP will not release HP ESX and ESXi customized images for VMware ESX and ESXi 4.1 U3
If an HP ProLiant server requires an HP VMware ESXi customized image due to devices not being supported by the in-box drivers for the primary network or storage adapters, install the HP VMware ESXi 4.1 U2 customized image and then upgrade to VMware ESXi 4.1 U3."
I'm thinking I have two options;
1. Upgrading from an HP 4.1 custom installation to the standard vmware 4.1u3, then up to 5.1 (and hope drivers are all ok)
2. Install HP ESXi u2 customised install, and then upgrade to 5.1, This way I'd skip u3. (assuming there's an upgrade option)
Regards
Carl