You can add the pilot client to the downloads page. Add the file to wherever you store the other downloads (or a subfolder) then go to the "airlines" tab in the admin section of phpVMS and do something like this:
The bottom 3 boxes are where you add the file:
File Name / File Description / URL to file
After filling in those boxes, click save. You may want to upload that Segoe Font Pack too as users on Windows 7 will need to manually install that for the ACARS icons to appear.