This file allows you to modify .DLL files (I think it also works on .EXE files) to, for example, get round the text limit in cinematic dialogs or, for modders, to give a name to a unit. You'll see, the program is easy to use.
First, back up the file to modify (e.g. language.dll). Then, open that file with Resource Hacker. There are lots of folders, but each folder supports a limit of codes.
You'll see numbers, and you can create new. Type a number (e.g. 10619), put a comma after the number, do many spaces (in fact, one real space and one "tab" space. Copy a tab space and paste after the first space or there'll be bugs) and put two inverted commas (""); between these signs, type your text and compile the script. Save the file and open AoM.
Check more infos in Forums (at http://aom.heavengames.com/cgi-bin/forums/display.cgi?action=ct&f=13,21755,0,10)