Game wont even install

    Hey all, I recently purchased a CD copy of sins, ran the instaler program, and noted that some of the information in the installshield windows seemd to be using characters in a foreign language (they showed up as little squares where letters should be) I agreed to the licensce agreemant (which was all in english) nd hit the "install now" button, then a  blank error message window pops up and the instalation aborts itself, and I'm left with no idea why, I am running windows xp on a system that can run the games demo with absolutly no technical difficulty whatsoever, can somebody please help?