Sorry to tell you but this is kinda useless xD Changing item price is easy as ****.
Code:
update _RefPricePolicyOfItem set PaymentDevice = 2, Cost = 500 where RefPackageItemCodeName = 'PACKAGE_%'
Just change the payment device and cost and replace % with the item codename which could be found in refobjcommon.
I have gone a little bit off topic. anyway this is the wrong section.