Another option for you if you're using Windows XP is Microsoft's Image Resizer - a useful image resizer that integrates into Windows Explorer so when right-clicking on an image (or multiple selected images) you get an extra option available to you --> "Resize Image". If you select this, you're presented with a pop-up box offering you various sizes for your image(s). Pretty much 1-step resizing.
I'm not sure if they ever released a version for later Windows releases...
The XP Image Resizer is available on this page:
http://www.microsoft.com/windowsxp/down ... rtoys.mspx-Martin.