I am flying from the US (Phila) to Prague. I have a 6.5 hr layover in Amsterdam.

I plan to take the train to Centraal, then back (for the flight to Prague.)

Could anyone let me know what I'll have to do (customs, passport check, etc.) when getting off the plane in Amsterdam (before going to the city,) and also what I'll need to do before getting back on to Prague? The flight to Prague is a different flight/airline. About how much time will I need to give myself to do everything (check back in, etc.) for the return flight to Prague?

THANKS TO EVERYONE. Help is much appreciated!!!

Mike