Interesting question - here is how you do it: If you have downloaded the plugin dont unzip keep it in zip format and follow below: 1. Go to your wordpress admin. 2. see on the left column "Plugins". 3. Click on "add new" link under the plugins tab. 4. When new page opens - Just see at the top you will see an option "upload" click on that. 5. Just browse the zip plugin file - on your computer and click on "install" That's it! Hope it helps...
I am really surprised by this question.. and that too a guy with name SEO.raj and 227 posts... Activating a plugin in wordpress is the most simple thing ever..