Changing wp-login.php filename and wp-admin directory

Greetings:

I have upgraded to WordPress 2.1 and it appears to be working fine.

I am considering changing the name of the ‘wp-login.php’ file and the ‘wp-admin’ directory. The reason why I am considering this is that looking at my server logs, IP addresses seperate and apart from the IP address (and it is also not search enging spiders/bots) handed out from my ISP (I log this) are accessing the wp-login.php page. Therefore, I want to be cautious and take precautions to prevent possible hacking.

Because my IP address handed out from my ISP are not dedicated, it is hard to write a rule in .htaccess blocking out all IP addresses except mine from accessing wp-login.php and the wp-admin directory.

Knowing that every install of WordPress has both the wp-login.php filename and wp-admin directory and knowing that hackers do download the software and ‘reverse engineer’ the code to look for weaknesses and flaws, what type of code modifications would need to be done to the file “wp-login.php” and wp-admin directory to tell the code the new filename of ‘wp-login.php’ and new directory name for wp-admin?

Thanks for your help and support in advance.