iPhone app, join some code and mods - Immediate Start

I have three pieces of code that I would like to combine into one app - I have a simple credit card payment app - I have some proprietary code, not very big - have a server side web service - I have a C++ module use to decrypt the data sent from the phone Task a) merge the credit card app and the proprietary code c) modify the sent data to the server (add in some new fields) (simple) d) decrypt data at the server end using the C++ code I have e) response data is sent back to the users phone (already doing this) It should not be particularly complicated. It is more a matter of adding code together for an end result. I am happy to pay extra if it turns out extra work needs to be done.