It's not too difficult.  You'll need to install the game on both the internet connected computer and your regular gaming computer.  From the sounds of it, you've already done that.

You need to start a Metaverse game with the online computer.  Once started, save the game and copy the sav file (or the entire My Games folder) to your gaming computer.  Play the game to the end and save the game.  Transfer the sav game to your internet connected machine and load the sav game.  End the game again on that computer and it'll ask if you want to upload the score.  Click yes and put your login info there.

Lather, rinse and repeat.