You can you the tags if you want. edit them however the sam heck you want to!
1. right click on image.
2. select 'save as'
3. open editing program (varies depending on software)
4. have fun!
5. DO NOT INCREASE/DECREASE SIZE. DOING THIS WILL MEAN NOT GETTING TO USE IT. I HAVE TRIMMED EM DOWN TO THE CORRECT SIZE
And don't worry! You don't have to give credit!