There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read how to get help
If you can find an icon you want to use off the web, then just stick it in your /home folder somewhere and go back to the Kopete properties, click on the Kopete icon in the top right, and then you can manually navigate to where you saved it.
"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke