[GregC]

Erm, when you compile, the compiler makes a new file called FrcCode.hex every time you compile.
FRC_Default.hex is just the pre-compiled default code that they included in the zip file with the source code.
Are you getting errors?
If you don't see a FrcCode.hex file after you've successfully compiled...something is wrong. If that is the case, try to find any weird lines in your output where MPLAB is compiling your code...and paste them here.
A lot of people (including me) would be willing to try and help.