If you have access to the packages directory but your machine is not registered you can use the command to install the package, remember to have dependencies resolved.
$ yum --nogpgcheck localinstall <package_name>.rpm
you can also use:
$ rpm -i <package_name>.rpm
Even when launching VMware PowerShell CLI with administrator privileges you are still unable to start it.
Moreover, you are unable to change execution policy for the machine.
Try the following it only changes policy for current user.
Set-ExecutionPolicy Unrestricted -Scope CurrentUser