Ctrl-Q, pause.
Ctrl-P, play.
Ctrl-RightArrow, skip forward a minute. Can be prefixed by a number of minutes, ie "3" followed by "Ctrl-RightArrow" will jump 3 minutes.
Ctrl-LeftArrow, skip back a minute, can also be prefixed by a number of minutes
etc.
The MCE remote generates these same key presses. The Hauppauge and other remotes can also be configured to send these same key presses, but it's not done automatically.