I have a big image that needs to be sliced into about 50 smaller images. I know there is a way to do it using 'guides' in photoshop and 'save for web and devices' options. I just can't seem to find any documentation on it
In Photoshop, pull out guides where you want to slice the image. When you have all the guides in place, choose the slice tool from the tool palette. Once the slice tool is chosen, you will see a button on the toolbar that says "slices from guides". Push that button and Photoshop will put labels on the slices. Then just go through Save For Web dialogue.