you can get hotscripts clone for free in this thread but this script is have vulnerbility, my site had been hacked twice using this script please share your knowlegde to fix vulnerbility from this script i've got this information about what file that need to fix from http://www.milw0rm.org/exploits/4633
Partial solution is to simply stick an .htaccess file in your siteadmin folder that only allows your IP. something like... order allow,deny allow from 1.1.1.1 This won't stop them from getting admin user and password but it will stop them from using it to login at least.