Here is the simple way to hide your important and secret files in an image file...the capacity of storage depends on the file to be stored and also the image file.
Let files to be hide are:
1. abc.flv
2. xyz.txt
3. blah.blah ……
Add these Files to a archive say secret.rar And Image File be Image.jpg And these files are in C:\New folder now goto “C:\new folder” and type Copy /b Image.jpg+secret.rar new.jpg Now there will be a jpg file named as new .jpg which will totally act as JPG to extract ur files :

a) rename new.jpg to new.rar and extract
b) right click new.jpg n open with win RAR.