So far, this seems to be the best (only?) tool for unpacking the .pack archive files:

One of the nice features is the export to text file, which I've used to begin collecting the data I've posted at https://forums.totalwar.org/wiki/index.php/ETW_Data (feel free to add your own detective work results)

Some questions:
  1. Does anyone have any other .pack file tools?
  2. What other tools do you use?
  3. Shouldn't a list of tools be a sticky at the top of this forum?