I have 6.4 but there was suppost to been an updated version of Georges c-script tut reflecting the 6.60 update changes since v6.4 of the engine had several problems and more script commands were fixed,upgraded and replaced by 6.60

the date of the 6.4 version I have is 12/19/2006
the updated one may not state its for 6.6 but probably has a later date