I have to say 2 things:
Number One: Yes , you can alter the words and write something you want.
Only open the Cheat Engine 5.4 and choose , in Value Type , Text , and search the word that says the FireFlies you want to change.
After the scanning finish you will found 1 result , replace the value with the words on the FireFlies you want to see and freeze it.Remember! In the scanning and replacing the value use Capital letters.Example: replacing "GO" with "STOP" all in that letters.
Number Two: If you go to my thread of this section you will see the cheat of bullefproof , in some clients the cheat doesn't work , but i've founded a client that let it works fine. There are 2 parts:
http://www.mediafire.com/file/nnqxey...dous.part1.rar
http://www.mediafire.com/file/jjye3z...dous.part2.rar
Download it and do the cheat. If still it does not work I'm going to create a program that does this cheat works.