q1w2e3

Hi. I've played Civilization III on my computer (windows xp, pentium 4 desktop pc) before, but I ended up uninstalling it to make more room for other programs. A while later I came across the game and figured i'd try it out again. After i put the disc in, the main screen popped up and i hit the install button, but install shield came up with a window saying "Do you want to completely remove the selected application and all of its components?" (which i'm guessing is the exact opposite of what it should say). Anywho, its pretty frustrating. any help would be appreciated