get File Juicer. With File Juicer you can
Extract images from a PowerPoint slide show or presentation.
Extract images and text from PDF files.
Recover images and video from erased flash cards
Recover text from damaged files
Extract the images and HTML files in Safari's cache.
Extract attachments from email archives.
Rebuild simple PDF files into Word documents
Convert iPhoto's iPod cache files and ithmb files to TIFF.
Recover photos from your iPod if you have lost your Mac.
Extract Flash animations saved in .EXE files.
Convert ZIP files which have been saved as .EXE files to zip.
Extract the JPEG pictures from Canon & Nikon RAW files.
Use it for forensics examining cache files of various kinds, or to "carve" out files from disk images
Invisibly attach files to images - simple steganography
File Juicer doesn't care what type file you drop onto it; it searches the entire file byte by byte. If it finds a JPEG, JP2, PNG, GIF, PDF, BMP, WMF, EMF, PICT, TIFF, Flash, Zip, HTML, WAV, MP3, AVI, MOV, MPG, WMV, MP4, AU, AIFF or text file inside, it can save it to your desktop or to another folder you choose.