Hey There, I've been using this super simple free program for a couple of years, you just open it up find the pic or pics you want type in the size and there you go you have them in a postable size you can delete them after you post them and your originals will be still in tact.
http://www.fookes.com/ezthumbs/Not sure if this link works but you can copy and paste it to your tool bar and it should take you there or you can google ez thumbnails, hope this helps.
