Ya nikhil is right Irfan view should do the job easily. Just go to file>Batch Converstion/Rename check mark the use advanced option and click on the advanced setting button and select the width and height. Then select the folder and drap it to the Input window and say start with in seconds all your images will be resized

you can get irfan view from any of the digit cd's DVD's.
..:: peace ::..
Jeba