Install:
Simply unzip and put in your addon scenery folder as you normally would for manual install. Start-up FS9 and goto the settings scenery addon page. Then, add scenery name "Grand_Lake_O12" from where you placed its' folder. And, restart FS9 for it to recognize it.
To un-install, repeat, going to scenery addon page and choose delete scenery (Grand_Lake_O12.) Then mouse-over and confirm deletion. FS9 will un-do it next time it is started.
Copy the FX files to the FS9 main effects folder. Copy their textures to the FS9 main effects texture folder. These effects are for the fisherys' dam spillway and camp fires that reflect lamp light at night.