Just use paint. They come out fine if your just making them smaller.
Open paint, then drag the little blue box on the bottom right corner all the way to the bottom right of the screen to make the white section larger. Use the tool on the left that looks like a dashed line(----) box, Hold your left mouse button down while over the white area, while your still holding the button drag the mouse and make a small box, right click inside the box and click on "Paste from", then navigate to where your pics are at and double click your picture, now your pic will show up in the white area, right click again and select "Stretch/Askew".Type in 70% in both the top white area's(horizontal,virtical) and click ok.Your picsture are now smaller.Just save them in a folder where you know there at and viola. Once youve done it once itll be alot easier. Iv found for down sizing pic's paint works great. But if you try to inlarge them then its awfull.