Set up VPN so that it doesn't interrupt current connections?

Set up VPN so that it doesn't interrupt current connections?

I currently use Cisco VPN client on Windows Vista to connect to my school. However, whenever I use it all of my connections get dropped; e.g., Firefox downloads, torrents, etc. Is there a way to set it up so that it doesn't interrupt my current connections, or is there another VPN software that does it?