that way you get it right when you are going add the files to a pk3.
to do that:
since you hopefully opened the file in winzip, you use the "add" button on the top besides "extract"
find the files that you placed in c:\models\players\kyle
and you should be done.
Remember: You have to start a new game when you change the player model, otherwise you get a pretty nasty bug where the weapon doesn't show up right.