This will be my first flight on Continental. I'll be flying

CDG-EWR on CO 57 (the 777 flight)
EWR-CDG on AF 19

Ticket is on CO stock. I am a Skyteam Elite Plus (Flying Blue Platinum in fact).

Will I be able to print my boarding pass at home for this flight? Is it possible for transatlantic flights? From Paris? Does it cause a problem that the return flight is on Air France? Just asking, because I know from experience that the AF web CKI system would have trouble with two airlines on one ticket.

One more question: what wait times can I expect at immigration at EWR? This flight gets in at 12.20pm, not the busiest time, but then I don't know whether EWR tends to have well-manned immigration booths.

Thanks