I flagged the last answer here but with no response.. its not an answer :
http://travel.stackexchange.com/questions/2177/can-you-travel-to-the-us-6-months-before-your-tourist-visa-expires/11411#11411
http://travel.stackexchange.com/questions/2177/can-you-travel-to-the-us-6-months-before-your-tourist-visa-expires/11411#11411