I am not sure what model of Compaq server it is equivalent to,, I guess you want to install the CM on this server. But I donot think this is going to work for you, because you have to buy this server from cisco (branded as MCS) and the CM has some check on the h/w that is running on, which might fail if you donot have MCS server.
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.