You can download it from the Cisco website here, it is found under Products > Security > Virtual Private Networks (VPN)> Cisco VPN Clients > Cisco VPN Client. However you need a valid service contract associated with that login to allow you to download it.
Do you mean copy the files from another computer onto yours and jun without an install? If so, you could try, honestly i am not sure if it will work, some programs don't like doing that.