Image display only on Products Listing

Hi,
To display the product images I use "SigPlus" extension and it works fine,
but I also want to upload a single image
(that I don't want it to be displayed in Front end)
in order to display the Products listing with both Image and Text.

Thank you.

Thank you for your instant reply!!!

The code doesn't do anything.
I don't know if I am right but I edit the front end CSS file and changed

.hikashop_compare_table #hikashop_main_image_thumb_div{
margin:0px;
border:none;
}

to

.hikashop_compare_table #hikashop_main_image_div{
display:none;
}

Is it possible that this
#hikashop_main_image_div{ display:none; }
is one of those two?

.hikashop_compare_table #hikashop_main_image_thumb_div{
margin:0px;
border:none;
}
.hikashop_compare_table #hikashop_main_image{
display:block !important;
margin:auto;
}

I changed both of them to display:none
but it didn't worked.

I want to do this
On product page I don't want the image that I added (in back end) to be displayed.
Because I want to display the images with an other extension.

OK SOLVED

on front end CSS changed

.hikashop_product_main_image_thumb{
margin-bottom:5px;
to
.hikashop_product_main_image_thumb{
display:none