Bryan,

This is something thats commonly done in the games industry, a bunch of images placed into one stream with a directory to get them back out. You could use bitmaps (BMP) and build your own directory indicating the start and end points so that they can be extracted later. Another valid alternative is to pick a file format that supports multiple images, the LeadTools (www.leadtools.com) support their own (compressed) multi-page format, TIFF and others. If you want to add the archiving functionality without a great deal of fuss, you can download the zlib (www.zlib.com) ActiveX control and use that.

HTH
Neil