The radio_track.wav is in the stock game. I do not know it would matter if it isn't there. It is a music file.
What operating system are you using Poacher? EDIT: Never mind.
If using Win 7 click your start button, type folder options in the box, select folder options from the list, click view tab, scroll down and uncheck hide extensions for known file types. This will give you the .ini/bmp/jpg/txt/etc for your files.
If using Vista or ealier go here:
http://filext.com/faq/file_extension_information.php
Hope this helps a bit.
You said you have it "sussed". Can you now hear the music and such?
WV