Some Equipment creature cards in other sets have reconfigure, a different ability that attaches them to a creature. Reconfigure is not an equip ability. Reconfigure abilities cannot be activated at instant speed by Forge Anew's second ability, and you may not pay rather than pay their reconfigure cost with Forge Anew's last ability. Equip variants or equip abilities with restrictions, like the "equip Human" ability of Dúnedain Blade, are still equip abilities, and you may pay rather than pay their cost.