I have (ESXi 4.1 U1) according to the Update Manger in vCenter Server system. We are entitled to: vCenter Server Standard, vCenter Site Recovery Manager, vSphere Enterprise Plus and I know we have license for newer products..
1) VMWare Product Interoperability Matrixes/Solution Upgrade Path shows ESXi 4.1 U1 to ESXi 5.0 U2 as an in-place upgrade. If I can get to that point maybe I can do this so called "in-place upgrade" to another version level up until I'm current. I need this dummy downed way because I have no clue whats needed to download and do this. Seems there is a Standard or Enterprise download, then you deal with storage drivers the hole big bang. I'm logged into my account and can't locate a vSphere 5.0 U2 download. I have a support ticket opened but I'm not sure how deep my support level is with VMWare. How do I start and make it work without getting overwhelmed and side tracked?