By default the movie files are in My Documents\My Videos\Jaman Videos, if you're using Windows. You can move these files to your new computer and import them to the player, but I guess the tricky part is moving them, as they're about 1.5 gigabytes each. If your computers aren't networked (i.e. if you can't share files between the two computers over the network), you could try using a USB drive, or burning the movies to a data DVD.

Also, don't forget to authorize your computer from the Jaman Player on your new computer!

If you movies were purchased or rented, they will be playable after you import them to your Jaman Player on the new computer (provided that the rental period haven't expired for rentals)

How would you transfer them to a mac?

Essentially the same on a Mac, jsabry. As long as you get the movie files onto your hard drive, via external drive or network or whatever, you can import them into the Jaman library by clicking Add Movies in the player.

after adding movies and then clicking on them, I get an error message, "This movie no longer exists on your system. Unable to play it". This despite dragging the movies to the jaman video location on the mac....any thoughts?

It's important that you delete the entries that are in the Jaman player before you add them again. Does that make sense?