ESX 3.5 with .vmx
1. Copy the VMware image to the ESX server, it must be uncompressed
2. Browse to the data store using the datastore browser in VMware Infrastructure Client
3. Right-click on the .vmx file and choose “Add to inventory”
ESX 3.5 with .ovf
1. Convert the .vmx to .ovf
2. Go to File> Virtual Appliance> Import within VMware Infrastructure Client
3. Choose “Import from file” and give the path to the .ovf file
4. Continue with the wizard
