plz help in os commerce site

[delickate]

hello guys,

  i need to show an image after each row showing on index page just like this :

 

  a    b    c

 

  e    f      g

 

 

here a,b,c,e,f,g are the products showing on index page.

i need to show them like this:

 

a    b    c

  @@@@@@

  e    f      g

@@@@@@

 

here @@@@@@ is some kind of image.

any body knows how to integrate this image after each row.

plz help