OP-ED CONTRIBUTOR Austin, Tex. SO what can we expect from Karen P. Hughes if she is confirmed as under secretary of state for public diplomacy and public affairs? What steps will President Bush's confidante take to rehabilitate America's image in the Arab world and around the globe? While reporters and Congressional staffers are combing Ms. Hughes's public statements, interviews and speeches in advance of her confirmation hearings, I accidentally stumbled into a little research project of my own. In my garage. Back in 1976, Karen Hughes - then Karen Parfitt - was my star journalism student at Southern Methodist University...