do you have access to phpmyadmin, just go to table prefix_user (usually wp_user if you didnt edit the prefix) edit password with your password . but your new password must be MD5 you can genereate MD5 password from here http://www.adamek.biz/md5-generator.php
hi,
usually the trick is with css , like this
<!–[if lt IE 8]>
<style type=”text/css”>
@import url(“http://s.wordpress.org/style/ie.css”);
</style>
just go to phpmyadmin and go to table prefix_users , and change user and password like you want, but first , password must be MD5 you can create MD5 Hash for your password in here