1: When you want to respond to someone, you click "Reply" in the lower right of the page. You do not make a "New Topic" every time.
2: Do not abuse people who are trying to help you by calling them a "dumb***". If you do this again you will be banned.
3: Click Start menu, then click "Documents" (it's on the upper right). This will open your "My Documents" folder. In this folder is a folder called "Blockland". In your "Blockland" folder there is a folder called "Add-Ons". That is where add-ons go.