Here's the full deal from Howard Beck:
(And Chauncey Billups is amnestied).
Incidentally, Nivins is a St. Joe's big man who was drafted in '09 and has been playing in Spain ever since. Printezis is Greek and was picked by the Spurs in '07, but stayed in Europe. His nickname is apparently "The Big Fish". He is now officially my favorite Knick of all time.
I'll update with links to stuff from the press conference itself once it's available.