Updating VMWare ESXi from 5.1 to 5.5

In the previous post in the series of my “VMWare Adventures”, I was having problems with the hardware passthrough feature with ESXi 5.1 (read the previous post if you want a recap on what ESXi and passthrough are).  With the recent release of ESXi 5.5, and favourable comments in the communities, I decided to give the upgrade a shot.