Yes, you can do this.
You need to put the item in question into your shopping cart, then open your cart and look at the item.
Under the shipping time it lists a part number, which is the model number that's been modified to reflect that it's a refurb. Though the first couple of characters have been changed, Apple maintains the last four or five (depends on the kind of product) to be able to identify the product.
I just checked, and the modified model number for the 2.66 15" MBP in the refurb store does not come close to matching that for the model listed in the main store. The refurb item is not the current generation