
Ok, for those who don't want to use a hex editor to play string names and possibly end up messing up their string table, here's a simple way to do it using Eschaton 0.5.1.
First, open up your map in the main editor and then hit cmd-f or ctrl-f depending on your system to open the search window.

The quickest way to find something is by requiring it to search for all terms because a lot of tags have the same name but different classes or variants of the name.

Double clicking on the tag you want will immediately open the tag class folder and select the tag for you (you'll have to scroll down to get to it most likely).

So as you can see, we've selected ui\multiplayer_game_text and the string "%s commited suicide". %s is a place holder used in formatted strings to represent a string which the program (halo) will fill in. %d means decimal. It is important not to rearrange the order, add or remove these place holders or it will most likely cause an error.
When changing a string, it is important to remember that the character count has to be the same length because of the way the string table is organized. Luckily, Eschaton will auto-truncate and add spaces to make the count correct.

So now we've changed the string to read more accurately. Pressing enter in the text box will apply the changes. (In some cases, the text will have multiple lines, RB doesn't handle scroll bars with dynamically changing text very well so you'll have to key up and down through the lines and copy line breaks from text files.)
Now all we have to is load the modded map and see the results.

Hope ya'll understand that and are able to make use of it.
Note: Eschaton is cross platform. You can use this for windows as well.