after the new update the CD was not required to play the game
Actually it never has been.
If you have internet access on your laptop, you can install Impulse and download the entire game. Or if you can share the disc drive across your network or copy it over to the laptop somehow to run the install, that will work too.
Even better, if you have a friend or family member you want to play with, we're fine with you running it on your desktop and laptop at the same time for a LAN game.