unzip them so they are in a folder of their own, ftp into your wordpress install and upload the folders into, I believe its something like wp-content/plugins
after that login to wordpress and go to plugins and activate those you want to use
Assuming you have your blog hosted on your server.... if that's the case I've got some video and pdf's that show you just about everything you need to know.
PM me and I'll show you where if you still need help.