Make sure you read the Application note at the top, before trying these. There are a mass of Hacks on Vishal's pages, but you must note if it is current or was used on earlier public releases.
I am a contributor to the site, and have tried several. But the unwary can have a disaster. the last, for example (Remove ribbon) can, according to your particular edition and setup, leave you with a black screen. have an image ready, before trying the hacks.