I use a free program called photofiltre.
http://www.photofiltre-studio.com/pf7-en.htm Once you've downloaded and open the program, click on file and open, then locate your pictures, click on a picture and then right click and select image size. Fine the largest number and type in 1024, the other number will automatically change. Click Ok, then click save. All done....
If you want a registration key: 74B07-65276-8C4B7-DB27F or 75B17-C5276-8E487-FBE7F and use this name: KaiZer SoZe
Open up the program, then look on the tool bar and where you see the "?" mark, click on it. Next click on registration, put in the name and the registration key...should be good to go.