local host installation problem

guys i have done exactly what is there in here

http://www.tamba2.org.uk/wordpress/xampp/

after doing this i started to install php through this

http://localhost/wordpress/wp-admin/install.php

but still there is a problem i cant go forward wat’s the prob i tried 4-5 times still hanging

i made like this in notepad
wp-config.php

define(‘DB_NAME’, ‘wordpress’); // The name of the database
define(‘DB_USER’, ‘username’); // Your MySQL username
define(‘DB_PASSWORD’, ‘password’); // …and password
define(‘DB_HOST’, ‘localhost’); // 99% chance you won’t need to change this value

it says:

Warning: require_once(ABSPATH/wp-admin/admin-functions.php) [function.require-once]: failed to open stream: No such file or directory in D:\Program Files\xampplite\htdocs\wordpress\wp-admin\upgrade-functions.php on line 3

Fatal error: require_once() [function.require]: Failed opening required ‘ABSPATH/wp-admin/admin-functions.php’ (include_path=’.;D:\Program Files\xampplite\php\pear\’) in D:\Program Files\xampplite\htdocs\wordpress\wp-admin\upgrade-functions.php on line 3