Sure, just follow these simple steps.[8D]

1. Download this http://bluefive.pair.com/pixresizer.htm(Your picture size must be no greater than 300kb. This will resize it for you).

2. Once you downloaded the software, click on "PIXresizer".

3. Now click the load picture button. Select 100% for "new size".

4. Click "Save Picture", then go to my pictures and select the resized image.

P.S. If you want your picture in the post, click onthe check box "Embed picture in post".