Looking for Powershell Bulk Add from CSV for Sharepoint Group (Without PSSnapin)

Hi All (Help!!),

I hope you guys can save me - I need a script that will add bulk users to a sharepoint group (2013)

I am Subsite admin and can add users through the interface but this is quite cumbersome.

Unfortuenely I am limited without admin rights on my pc so I cannot install the PSSnapin which I believe makes things easier

Your help is more than greatly appreciated :-)

Cheers

Will