Are your stickers just the PNGs on this page? If so, they will look terrible printed, as they're only 75dpi. Next time, use AT LEAST 200 dpi, and 600 or so is better still. Also, clean up your images and use a better NDS logo (the bigger of a source image you can find, the better).
Edit: Just in case you don't understand what I'm saying, I'll try and explain it further. What looks good on a computer monitor won't look good on a printer at the same size, and just printing something from IE or whatever will try and make it the same size as on your computer. To get a printout that looks as good as an image on your monitor, you should make the image 4-8 times larger in terms of pixels, but print it at the same size.
i kinda just did this in paint as i lost my photoshop cd so thats why its so sucky