Urgent and Simple: Editing an open source API

Hi, We need to edit an open source fingerprint recognition API to change the appearance only. We want to use this API in one of our commercial projects and we do not want it to be recognized by our customers. The API is in the form of a DLL which can be easily disassembled. The contractor must change methods and classes names and edit the functionality so that it acts as described below: 1.A function which receives an image file, calls the recognition functions, and returns name and accuracy 2.A training function, which receives an image file, name/ID, and adds it to the fingerprint database This project is extremely simple, so new-comers are welcome. We just need it to be done as fast as possible,and our budget for this project is $50 or less.