The server model you posted isn't on the VMware HCL for any release of ESXi 5. With that in mind, I wouldn't advise trying to install onto it. While it MIGHT work, there's no way to know without installing. You could run into serious driver issues (even with the HP customized install) too. If you have a support contract with HP, I would contact them directly to see IF the customized installer is certified to work on that model.
I'ts not a minor issue to install that model not being on the HCL. For one thing, VMware support can use that to decline working on any issues with those hosts. Not that all of them will, but they can do it. If the blade chassis supports newer models, that ARE on the VMware HCL, I would see if you can get those purchased where you are.
I would also advise consulting the HCL, and the server manufacturers, before purchasing ANY servers slated to become ESXi 5.x hosts. Even if you're looking at brand new models. Actually IF you're looking at brand new models, I'd have compatibility triple checked first. It can take a bit of time before drivers, builds, etc. are updated for newly released hardware. More often than not you'll need to use async drivers for at least some of the hardware, even if it lists things as being 'inbox'...
