Finish Project code written for PIC Micro controller in Assembler -- 2

I need some PIC micro controller code written in assembler to be modified to include additional features and capabilities not present. Essentially I began writing some code for a project but haven't had the time to complete. MUST BE ABLE TO WORK FROM PREEXISTING ELECTRONIC SCHEMATICS AND CODE WRITTEN IN ASSEMBLER. Must have experience with ultrasonic transducer module HC-SR04E. I am making a master sequencer control panel that communicates with 31 slave ultrasonic transducer modules using a 2 wire, bit banged, clocked data communications network. At start up, the master sequencer control panel is responsible for testing and recording which of the 31 addressed ultrasonic transducer slave modules are present. Once the present ultrasonic transducer slave modules are accounted for the master sequencer control panel is responsible for commanding each of the present ultrasonic transducer slave modules to conduct a ultrasonic perimeter breach test and accept a positive or negative response result. If a breach is detected the particular addressed ultrasonic transducer slave module will signal the master sequencer control panel to trigger one of 8 possible alert zones.