Sorry this is so late. Since the system is not going into production, yes, there is a workaround. Firstly, install the CUCM to an intel based system. I have a Sunfire AMD Opteron based server. I created the vm on a Mac Pro running VMware fusion, then moved it over to the ESX box. Since the Mac Pro has intel hardware it installed with no issues.
As far as getting the IP Media Voice Streaming service to start, there are ways, best to just google them. Bottom line, yes it IS possible, but completely unsupported. I have a similar system fully functional on an Opteron based VM in ESX 4.1.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.