I have a 128 mb smartmedia card and the pretec CF adaptor. It works wonderfully!
Because it is made only for smart media cards, you wont be able to stick an SD card in it.
sooo....copy the pics off the smart media card via the adaptor and move 'em over to the SD. you can then empty the smart media card in your camera and start all over.
I got all kinds of pics there, and its a great thing to take on trips and save lots of room in my wallet ;)