u just have to read the file
read me.html
in the package that u have downloaded
and follow the instructions
by the way
thats are
Installation: Famous 5-minute install
1. Unzip the package in an empty directory.
2. Open up wp-config-sample.php with a text editor like WordPad or similar and fill in your database connection details.
3. Save the file as wp-config.php
4. Upload everything.
5. Open /wp-admin/install.php in your browser. This should setup the tables needed for your blog. If there is an error, double check your wp-config.php file, and try again. If it fails again, please go to the support forums with as much data as you can gather.
6. Note the password given to you.
7. The install script should then send you to the login page. Sign in with the username admin and the password generated during the installation. You can then click on ‘Profile’ to change the password.
Upgrading
Before you upgrade anything, make sure you have backup copies of any files you may have modified such as index.php.
Upgrading from any previous WordPress to 2.9.1:
1. Delete your old WP files, saving ones you’ve modified.
2. Upload the new files.
3. Point your browser to /wp-admin/upgrade.php.
4. You wanted more, perhaps? That’s it!
Template Changes
If you have customized your templates you will probably have to make some changes to them. If you’re converting your 1.2 or earlier templates, we’ve created a special guide for you.