Just make sure to take your board off development mode when you're done. Certain things are done in development mode both in AdminCP and on the board, and you dont want this to happen on an active board. I would suggest doing this instead if your board is rather busy:
Find
CODE
define ( 'IN_DEV', 0 );
Change to:
CODE
if( basename( $_SERVER['PHP_SELF'] ) == 'admin.php' ) {
define ( 'IN_DEV', 1 );
}
else
{
define ( 'IN_DEV', 0 );
}
This allows you to put your AdminCP in development mode while leaving your board in non-development mode. Once you are done in AdminCP you can change the "1" to a "0".