Which Controller File Sends The $Product Variable Used In The Scroller Lists On The Home Page?

Hi, so I want to add something to the $product variable that is used by simple_list.tpl in the scroller blocks that I use on the home page before it assigns it to the tpl file.

I've been able to change the $products variable before that grid_list.tpl uses in the products.search and categories.view modes because I know where to look for it. In the case where I'm stumped, it's the homepage so I don't know which file to look into. Does anyone know which php file does this?

Use hooks in the fn_get_products function (app/functions/fn.catalog.php)

That worked, thanks!