The ryandoom_build92.zip file you have requested: Mods / Single Player / Ryan's DOOM 3 Mod Pak File - 18.56mb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
This pak file addresses a number of problems (at least I think so) in DOOM 3, most notably the sound effects for monsters and weapons. To install this pak file, simply extract the contents of this executable to your DOOM 3's ../base/ directory. NOTE: Make sure all previous versions of RyanDOOM are uninstalled prior to this current version being installed.
Have a look at the readme to see what it does exactly.