I would use a tool like HELIX to do that..
http://www.e-fense.com/helix/
Certain tools on that CD like the following might work for you..
foremost : Carve files based on header and footer.
fatback : Analyze and recover deleted FAT files.
Retriever : Find pics/movies/docs/web-mail.
Scalpel : Carve files based on header and footer.