I just bought one of the $50 1Meg SRAM cards from the source posted to
the list a few weeks ago. I think they are a little different, but if not...
On the small edge of the card that sticks out when the card is plugged
into your Zoomer, there is a sliding switch near the middle. Its kinda like
the switch on the Zoomer itself, except it is much smaller, and has no
spring back (OK I guess its not too much like it). Slide it over (whichever
direction it moves, and then pull the little piece of plastic to the side of
it. Its like a little plastic drawer that holds the batter. [This reminds me
all to much of those exercises in English class!]
By the way, the 1Meg card is working out greate, and I think $50 was
a good price. I don't know if they have any left, but if anyone is
waiting, I think you are going to miss the boat.
-mat