Use AutoCorrect in Word to change words like:

Sir,
Yours,
Dear,
(their address)
US

I'll leave the changed to values as an exercise for the reader.

Cheers

Paul.

Paul Haigh, Reg. 4120
(mk1) 6GB, Blue, 00254
(mk2) 12GB, Red, 00357
_________________________
Paul Haigh, Reg. 4120 (mk1) 6GB, Blue, 00254 (mk2) 12GB, Red, 00357