Change from PayPal Payment API TO Braintree Payment API

Our current site uses paypal's integrated processing and we need to have it changed to use the: [login to view URL] API Instructions for on our site where it uses the credit card processing API: 1) go to ***/[login to view URL] 2) use *** for login 3) Click "Upgrade" button 4) Tick "Silver" and "Credit Card" 5) Forwarded then to credit card form. This current old way was with paypal, we need to change it out for braintree and add function of customer ticking to save card for future use. Then on future visits to this credit card for page they will see their saved card that they can then just click Submit without having to reenter their information every time. Will need to also have a link to edit card on file when there is a card on file. Along with add a link to their member area here: ****/[login to view URL] that will allow if they have a card on file to edit it any time they wish as well. Now keep in mind we cannot store actual cards on our system. We store a token/string that braintree gives us after a successful store on their server of someones credit card information. Need the credit card form to submit to Braintree all user data and also be sure to carry thru these hidden values: invoice sid amount v And then... Upon successful charge submit those hidden values and other values to the [login to view URL] script as you will see the notes in that script that indicate the area that needs to execute upon a successful charge and then a failed charge All existing code that is being integrated with is simple php. Please only apply if you can help fix this today and have experience with PayPal API so that braintree api is no harder. Thank you!