I would suggest learning your way around the library some, and perhaps the 'find' and 'grep' commands, which can be helpful in these cases. However, to get you started, the function your looking for is 'eventDescribeEnvironment()' inside /lib/lib/events/describe.c. Also, 'GetHealthShort()' is found in /lib/body.c.
I would do a simple 'warmboot' after making your changes.
P.S. Don't forget to backup your files before making significant changes.