Installing Nomachine NX client as unpriviledged user

Not really new to Linux (more the other way around after using Linux too much ;-)). But how can I install the Nomachine NX client under Windows without administrator rights? The installer just bails out with a "You must be an administrator when installing this program.". I'm trying to use it on a system where it allowed to install programs in our home directory, so no need for admin rights.

btw, if someone could tell me how to install the client in your home dir under Solaris, I'd be happy too.