"My advice to fix the problem at his brother’s house was to replace the existing 4-wire outlet with a 3-wire outlet connecting the ground and leaving the neutral wire disconnected at the outlet."
If you were to do this it would result in current on the ground wire which is definetley not code legal. if he already has a four-wire plug just replace the cord, it's reletively cheap and inexpensive. Just open the back of the drier up, remove the N/G bond, hook ground/ground Neutral/Neutral and you have a code compliant installation.

-Will

(edited for spelling)

[This message has been edited by Elviscat (edited 06-21-2006).]