FOR PANEL:
Place all contents(except for Guages.zip and Sounds.zip) into the /panel directory of the Boeing jet of your choice.
EX: ..../FS9/Aircraft/B737_400/Panel
FOR GUAGES:
Extract Guages.zip into your guages folder.
EX: ..../FS9/Gauges
FOR SOUNDS:
Extract Sounds.zip into your sounds folder.
EX: ..../FS9/Sounds
Happy flying!