So travelover, if you entered a continental number when you booked the ticket, would you get the continental miles? Then if as Rudi says you changed to NW before/at checkin, would you then be able to get the 4,000 continental miles and accumulate actual/elite miles on NW? Or would changing to NW then prevent the Continental miles from going through?

alternately, if you accumulate the miles on CO, would they upgrade you when you show them your gold/platinum NW card, or would you have to switch to WP for miles to get upgraded? Anyone try this before?

Thanks all