Or how to get ESXi 5.0 installed using a USB stick.

I use a Mac to get my USB stick ready, and follow the instructions given in this article. But I followed the instructions and got the following error when trying to boot the server from the stick:

“mboot.c32: not a COM32R image”

So, the missing step is to create a file named "ks.cfg" in the stick with the following contents:

vmaccepteula
rootpw password
autopart --firstdisk --overwritevmfs
install usb
network --bootproto=dhcp --device=vmnic0

Now it works, you have a USB stick that can install ESXi 5.0 in your microserver.