I just installed the Wordpress blog on my site, but it can only be reached at .com/wordpress instead of just my .com site. How do I redirect it,so that when people go to my site they see my blog?
You need to install it at the "Root" level. If you have a cPanel host this is actually very easy. Log on to cPanel and then just drag your existing files from the /wordpress folder to the root level. Then log on and change the URL in your Settings in the Admin Panel. If you installed with Fantastico or script you need to pay close attention to the destination. If you installed using the 5 minute install with WordPress manually then you tell it where you want to put the files during the installation process. Careful moving images from folder to root as the links tend to break.
Be careful when installing on the root because it may overwrite some files. Is this an existing site or a new site?
put wordpress files in root folder or if you are using cPanel fantastico I can tell you simple steps to install wordpress in root or any other directory. Pm me if need help.