If NMM would use standard Windows return codes that would be "Invalid command line argument. Consult the Windows Installer SDK for detailed command line help."

Just in case you (or anyone else) hasn't figured this out, the account you are trying to install with does not have sufficient authority to complete the installation. I tried my domain admin account and had the same error. I logged on as the local administrator and installed without issue. Check your permissions and that's probably where the issue lies.