[ESXi4.1] Update ESXi 4.1 to Update 1

Just found an awesome easy tutorial to upgrade ESXi 4.1 to ESXi 4.1 Update 1, that I would like to share with you:
http://www.sysprobs.com/guideserver-virtualization-update-vmware-esxi-41-update-1-vmkernel-release-build-348481