Hmm, read your posts again a few times, and I'm still not 100% sure I understand where you want grey background, if at all. Maybe it's me, sorry.
What seems most likely to me from what you're saying is you wanting to change the image background on the product page, e.g. here:
initiativeready.com/index.php/home/free-...e-management-process
If that's true and you want it to be #eeeeee, too, then add the following lines to your custom CSS:
#hikashop_main_image {
background: #eeeeee;
}
Of course, this will only be visible if you're using PNGs with transparent background, because it's for the background of the image only, nothing else.
If I got this wrong again, best please post another screenshot with the area you want to change surrounded by a red frame, and a brief but clear description of what you want it to be like.
I do not understand what you're trying to say in that last paragraph, but the "Parameters for DIVs" do control the appearance of those "boxes" in product listings, e.g. here:
initiativeready.com/index.php/home/free-mnu
Only those boxes, nothing else and sure nothing on the product page, but what the parameters control, they do control "directly", indeed.