HP49G Easter Eggs

Press ON-D(f-4) followed by one of the following keys.
F2: Grayscale photo of Christian Bourgeois(use arrows to scroll if necessary, ON to exit).
F3: Grayscale photo of Cyrille de Brebisson.
APPS: Grayscale photo of Gerald Squelart.
VAR: Grayscale... more

Type RULES at the prompt to get a crossword puzzle showing the names of the producers. this is the same egg as the HP48.

I read this egg somewere, and I'm not positive if it works on all HP49s.
This is a tetris game. It has been hidden in the ROM.

Type "HpMad"(including quotation marks) in any input form. Have fun!