Check out the playlist feature - that may be the quickest way to get individual projects into a playable sequence ... plus it got auto-loading and auto-play vs. wait for key press options which may be quite useful ...
Save and lock the screenset as you would want Sonar to open because otherwise the playlist feature may not show you your staff view ...
Works nicely for us ... but test your setup ... and then test it again ... and then test it again ... and then test it again ...