The zip file has been uploaded since long before I posted this thread, actually. I forgot to make one change to the ALX file, so I went ahead and edited it (just alphabetizing) and re-uploaded the ZIP file. Try it again and let me know. I'm using WinZip 9.0 with Normal compression (so it should be compatible across the board).

ALX - Application Loader XML (I believe; possibly Extension for the X)
COD - Code (I think)

The ALX file is basically the installation file that you load into Application Loader that feeds what should and should not be installed. You can open it up with Notepad if you want to have a look at it. The COD files are obfuscated JAR files that are proprietary to RIM and BlackBerry. Both are simply file extensions of the installation instructions and system software files for BlackBerry devices.