I have a Cannon digital SLR, but when my usb cable when down the crapper on that I had to use our cybershot in the meantime. I used a similar method as a previous poster. I used fabric instead of poster board, and laid it down in front of a sunny window. Set the camera to macro, I usually do some with and some without the flash. With the macro lens, you may have to play with what distance the camera is from the product to get the shot you want.
Here's a link to a DIY lightbox too. http://strobist.blogspot.com/2006/07...to-studio.html