Thank you Mike Klinke very much Note: anyone want to use chm files under Fedora Core 3 can use this pacakges: chmlib-0.35-1.1.fc3.rf.i386.rpm gnochm-0.9.3-1.1.fc3.rf.noarch.rpm python-chm-0.8.1-1.1.fc3.rf.i386.rpm from http://dag.wieers.com/home-made/apt/packages.php Regards, Ibraheem Haidar