Adding existing attribute to all attribute sets

Question

I have an existing attribute for an embed code. I need to associate this attribute with 120+ existing attribute sets.

If I know the attribute set id, ho

Answer 1

If you are using a external script (not the magento setups script) this work form me

startSetup();
$setup->addAttribute('catalog_product', $attributeCode, array(
    'group'      => $group,
    'sort_order' => $sortOrder
));

(as answer to @Eric)