Phil - As Bas said,
Paint.net will work for you. I just downloaded and tried it. It's a little difficult to explain in a short post but I'll give it a try. Once you have downloaded Paint.net AND copied the North Carolina Woodworker logo onto your hard drive:
1. Open Paint.net
2. Click File/Open and open your proposed North Carolina Woodworker calendar cover.
3. Click File/Open and open the North Carolina Woodworker Logo.
4. With the logo on the screen, select it (Ctrl-A) and copy it (Ctrl - C)
5. On the upper right hand corner of the screen you should see two small icons, one showing your cover and the other showing the logo. Click on the icon of your calendar page. It should open on the main screen.
6. On the top left of the screen, click Edit/Paste In to New Layer. The North Carolina Woodworker logo should now appear onto your calendar page. Move it where ever you want using the mouse. Click and drag on one of the corners of the dashed box that surrounds the logo to resize it.
7. To eliminate the off-white background of the logo, click the Tools menu on the top left of the screen. Select "Magic Wand". Using the mouse, click on a white area of the logo and press Delete. Repeat until all of the white areas have been made transparent.
8. When you're happy with the result, click File/Save. Type in a new name for your cover and click the Save button. You're done.
Hope this is helpful. Good luck in the contest.
Ernie