You could also try this for a specific category…
Thanks to @Lee Saferite.
In your .phtml file, you’ll read a line of code similar to this:
Go underneath and ADD the following (where $cat_id corresponds to the id of the product category you want to display):
$cat_id = 6; // category_id for "specific category"
$_productCollection = Mage::getResourceModel('catalog/product_collection')