I want to share my Pangya PakFile Manager with you. Its a .pak packer/unpacker with a WinZip like interface.
You can open, modify and create the old universal XOR file format (S4.9) as well as the newer XTEA file formats which are used on S8 for example. For the XTEA file format we support Global, Japan und Thai.
open and browse pakfiles without unpacking
simply execute a file directly with a double click or enter
extract single files and folders directly via context menu or via drag and drop
exchange or add files inside the pakfile simply via drag and drop
create new pakfiles in all available formats
convert pakfiles from one format to another
add file associations and explorer shell menus to windows directly from within the options dialog (WinPak must be started "As Administrator" to be able to create these registry entries)
So to exchange a file inside a .pak simply double click it inside your pangya directory, drop in the file and start pangya to test it. No need to unpack, exchange files, repack, rename and move or copy the pakfile anymore.
I did a lot of testing and it should work without big errors. If you find a pakfile that doesnt work, please contact me.