I somehow missed the no internet bit in your initial post...
In that case all you need to do is add your TV shows folder as one folder in the config and then add your movies folder as a separate one. Make sure you've not got a tick next to any folder (as MediaPortal will default to this and you'll have to navigate away).
The My TVSeries plugin is unrelated to TV-cards. It is just easy way to manage tv shows on your mediacentre.