authorize.net online store coding...

hey guys i have a shopping cart on my store that has yet to be coded. We use [login to view URL] - had a coder who would always do it for us that is not available the next day and we need this coded asap. We have the api and transaction key, and all information required to code this store, anyone w/ experience having coded [login to view URL] and integrate it into website, contact me asap. we need this done today...thanks..