I am using CCK to add additonal fields to the product content type. I realised that the SKU, list price, cost, and sell price are not CCK fields and therefore not manageable by CCK. I am wondering what is the best way of manipulating of the SKU field such that I am able to place the SKU field under another fieldset along with other CCK fields. Can this be done using alter form hook or do I really need to hack into the uc_product.module?