If you have four outputs from the deck, and four inputs on the audio card, just hook them up and send each one to it's own track.
If the deck has a midi interface, you might could slave a midi sync to keep Sonar and the deck connected (set one to be the master and one to be the slave).
Other than that, I'd think you'd have to record each one onto its own track and then slide them around - read as much hard hand waving and slicing - to get them close.
Good luck!