From the page:
"No you can't just "sed s'/Red Hat/CentOS/' (someone always offers that)"
"No you can't just "sed s'/Red Hat/CentOS/' (someone always offers that)"
In the worst case, a complete overhaul might be required.
You might want to test it on this message and note the result.
Here are some emoticons to complete the test: ;) :) :D