Good. Now you are fully set up. Here is an example:
Rightclick the image and save it to your /home, after that give the next command:
( Note: extracing works without the password too, but you get an empty text file )
That is all there is to it.
More options are in the man-page: Here
So, I told you there are other programs too: "Steghide" is such a one and available in the Mandrake contrib sources. You can read more about it ( and Outguess too ) here:
http://distrowatch.com/weekly.php?issue=20040809#feedback
But beware, there is a typo in the command they give to wrap the steghide file. This is the correct one:
# steghide embed
-ef file.txt -cf file.jpg -sf output.jpg
NOTE: ( -ef . . not -pf like they say in the Distrowatch article )
Have FUN

Bruno
-- Sep 29 2004 ( Revised Dec 15 2005 ) --