uninstalling Open Office.org

How can I uninstall Open Office from my computer? I’m running Windows XP. I tried looking in “add/remove programs” but there was no remove option (actually, there were no options at all), and I looked in the “OpenOfice.org 2.0” folder in “Program Files” but I couldn’t find any setup files. I also searched open office, but after 2-3 minutes with no results I closed it. I’m trying to delete it and install microsoft office in its place so any help would be greatly appreciated. Thank you in advance for any assistance.