the .bin file structure is also used with the Diablo 1 and 2 games...by using -direct -txt in the shortcut to the game....the game will automatically create .bin files as long as you have created the correct folder directory...example(data/global/excel/)

from here you would insert your modded text files....then when running the game...the game would automatically use your text files and overwrite the bin files.

the phrozen keep has many tutorials on this.....i have tried using some of their extraction tools,but, i am not knowledgable enough to get them to work with the pack files to extract the text/bin files

if you open the pack files with excel....along with the other garbage...you can find most of the files that are located in the pack along with their file structures