Error: Options not available until WPG2 Plugin is Validated.

I’m getting this error and lots of different errors when activating the gallery2 plugin in wordpress. I got path error and so on. First of after installing wpg2 and activated it on plugins, when I go to wpg2 section on admin it lists several error messages. It’s looking for embed.php and realized I got a wrong path for the gallery2. But still I got an error options not avaialable until wpg2 is validated. Later I realized I just extracted the file for gallery2 but not installed it. hehehe. so installed it have the right path and all errors was gone:)