Question: If I put a breakpoint at the function header called in the task I want to single step through. How do I go about doing this if it isn't in the same text file as the calling Task line ?

Answer: There are a couple of options here- 1 is to go ahead and compile the source code along with the rest of the source so you can just debug it regularly. The second option is to look in the .map file and find the address of the function in question (ie _FunctionName) and just add the breakpoint at the hardcoded address (ie ba 0xBLAHBLAH).