Magento product list with custom productCollection

Question

For my module I need to create a custom productCollection built with various addAttributeToFilter modifiers. However, I have no idea how to get such a collection into a product list like the default magento one. So basicly I'd like to create a pre-filtered product list, could anyone give me some advice on how to start such a thing?

EDIT: Just to clarify, I can make the collection, just not show it like the default product list.

Answer 1

After hours of struggling I found a solution: I overrided Mage_Catalog_Block_Product_List and made my own _getProductCollection with:

$collection = parent::_getProductCollection();
$collection->addAttributeToFilter('attribute', array('operator' => 'value'));
/* more filters go here */
$this->_productCollection = $collection;
return $this->_productCollection;

This seemed to be the only way to get the original product list working without any errors or category problems.

With thanks to Guerra!!

Answer 2

use this in list.phtml:

$_productCollection->clear()
        ->addAttributeToFilter('attribute_set_id', array('eq' => 63))
        ->load();