I'm sure there is a way to do this, but I'm trying to launch an updated site in less than 3 days and frankly need to focus my attention elsewhere. What I'm trying to do is have the text on the checkout_payment page for the Shipping option selected say "Shipping:" no matter what option is selected. As it is now, if they select In-Store Pickup it says "Walk In" and if they pick USPS Priority Mail it says "United States Parcel Service (Parcel Post (4-7 days)):" which is really messing up the look I'm trying to achieve. I only want to modify this page, and leave the checkout_shipping page as is (where it would display the full text, delivery time, etc.). Does anyone have any suggestions on how I can achieve this?

Thanks in advance!