Hello! I just joined this mailing list a couple of minutes ago. I'll start to use CentOS for academic purposes. We'll try to build a cluster based in machines with this OS. First of all, I'd like to beg you for patience, because I'm comple- tly new in Linux. My first question is: every tutorial on installation talks about inserting an installation CD, but I'm not sure about what do it means... I've downloaded the four files .iso availabe in CentOS.org, but I don't know what to do with them. Should I burn this files into de CD the way they are? Should I unzip them before this? Details: I'm using Windows, trying to install CentOS 4 in a 32 bit's PC. I've downloaded CentOS-4.5-i386-bin.......iso. Thank you for any help! ~ J. Labaki Computational Structural Mechanics Labs Dept. of Computational Mechanics Faculty of Mechanical Engineering Campinas State University/SP - Brazil http://www.fem.unicamp.br/~labaki "Time is the best teacher; unfortunately, it kills all its students."