I'm loading all products using the product collection resource model.
$_categoryId = $this->getCategoryId();
$_productCollection = Mage::getResourceModel('catalog/product_collection')
->addMinimalPrice()
->addFinalPrice()
->addTaxPercents()
->addCategoryFilter(Mage::getModel('catalog/category')->load($_categoryId))
->addAttributeToSelect('*')
->addAttributeToFilter('status', 1)
->addAttributeToFilter('visibility', 4);
I'm however not able to display the minimal price of grouped products using for example.
echo $_productCollection->getFirstItem()->getMinimalPrice();
This does work for simple products. This seems to be related to the fact that this is a core/template block type and not a catalog/product_list block. But using catalog/product_list is not an option due to other reasons.