START-> RUN or press (window key + R) then type cmd in the dialog box it will open command prompt in the command prompt type the below commands.
copy /b a.jpg + b.rar c.jpg
it will show you
1 file<s> copied
and then u'ill have the third image that is c.jpg which have all the hidden files in itself .If u still don't understand see the below image.
So now you've know how to hide multiple files in an image and if u want to open the hidden files open that image with winrar and u'ill see all the hidden files in winrar and if u wanna extract these files extract them in any location or if u wanna open any of 1 hidden file double click on that.okay so now u've known how to hide multiple file in an image and how to extract it But u still don't know how it works in my tutorial i'ill tell u how these commands works.
d:(d is not the command it is your drive name)
cd(that means Change Directory it is not neccessary it is mainly use to select a folder in drive)
copy /b a.jpg + b.rar c.jpg (that means u r copying a.jpg & b.rar in c.jpg)
so do it and enjoy.