[Jon_Simmonds]

look for the following lines of text in the config.php file (the path you mentioned is correct)

//	****** PATH TO ADMIN & MODERATOR CONTROL PANELS ******
	//	This setting allows you to change the name of the folders that the admin and
	//	moderator control panels reside in. You may wish to do this for security purposes.
	//	Please note that if you change the name of the directory here, you will still need
	//	to manually change the name of the directory on the server.
$config['Misc']['admincpdir'] = 'admincp';
$config['Misc']['modcpdir'] = 'modcp';

you need to first rename the folders (using a ftp program is probably the easiest way) to something other than what it is, (on my old forum I used admincp->alpha modcp->beta) it does not realy matter what you choose. then edit the config.php and change the admincp/modcp to the new names you chose.

as for server management companies id recommend http://www.acunettmanagement.com/