^^^ Randy has THE BEST option i have ever heard and have been using for some time^^^
but on a side note there is a free software download here -->
http://www.giveawayoftheday.com/batch-image-reszier/?gp=1164911178 TODAY ONLY that allows resizing and rotation and such of multiple photos at once. i did not dl it, seems too gimiky to me from the description and reviews, but it might be handy to some and it is FREE