2. Where is says BUTTONURL, paste in the URL of your button., And where it says WEBSITEURL paste in the URL of the website you want to appear when you press the button. You can also change the hight and width so the button fits.
3. In the code there are 3 places to add buttons and web adresses. If you want to have even more, copy one of the 3 'codes' and replace the last number with the next number on the list. (if (ad==3) { will then become (if (ad==4) {
And that is it! :-)