Alan Renouf, a Senior Technical Marketing Architect here at VMware today updated his PowerCLI script that you can run on your existing vSphere 4 systems.
The script generates an HTML report showing your current license information and the equivalent vSphere 5 information. You can drill down into the license details to gain insight into your vRAM details, including pooled vRAM capacity, vRAM usage if all VMs were powered on and more.
Check out the video below, then grab the script. We’ve captured the specific steps you need to follow in a new Knowledgebase article: Validating vSphere 5.0 license information using vSphere PowerCLI script (2003877).