You need source code and re-compilation is required in order for these changes to take place.
If you don't have access to the source code then download the source code version and install is on your local machine > do the above mentioned changes > recompile the solution > copy the new dlls > replace the required dlls on your server = it should work
If you don't have access to the source code then download the source code version and install is on your local machine > do the above mentioned changes > recompile the solution > copy the new dlls > replace the required dlls on your server = it should work
Please as anyone re coded shipping computation for Fedex. Please this will be great as it's urgent. Thanks