Hi Thanks for your help , this clarified my confusion regarding where the boot.img goes and what is in it and similar with initrd.img and syslinux.cfg I have burned a preliminary CD and although it doesnt work yet I have only to do a correct ks.cfg file and associate /RedHat structure. Thanks again! Stephen. -- Stephen Johnston Phone: +49 89 32006563 NGAST Advanced Project Fax : +49 89 32006380 European Southern Observatory Karl-Schwarzschild-Strasse 2 D-85748 Garching bei Muenchen http://www.eso.org/~sjohnsto