Im sorry Terry,but i have to disagree with you here all the way.
Not only can u shift into 1st gear while moving,but ive been doing it for years and years!,..and trust me,when done correctly no damage is done to either the gearbox or clutch.
To put it in perspective , my last clutch survived 7yrs before i got rid of the car and 1st gear was as powerfull as its always been.
To bring even more perspective into it,i shift into first while moving ..umm about 20times a day,(give or take) ,so yeah ,im not sure where u got this preconception about it,but i can assure you its not it
i guess the secret of it Terry is alot of foot work
..which i dont mind..hehe
edit: and before i get any rebutals as to why its neccesery to shift into 1st gear at all:
well,instant short burst of power at your finger tips!..of course if i was driving a Ferrari or a Viper i wouldnt really need it!...so i guess it all comes down to what u drive and how aggressive u are as a driver