I need to fix the APIC bug related to the DAC960 driver. To do this I have to update the boot/install disk for Fedora Core 4. I've followed the instructions for FC2 at: http://www.techonthenet.com/linux/fc2_update.php Everything goes well, I boot the installation disc, but it tells me that it cannot find the installation CD in any of the cdrom drives. Then I tried simplifying the approach (just update isolinux/* and kernel-...i586.rpm from a pristine FC4 disc1). The installer gave me the same error. Who has the expertise to help with this? What is the installation program looking at to determine whether a valid FC4 cd is in the cdrom drive? Here iso-info for the disc I created (I made it match the original boot cd isoinfo output): isoinfo -d -i Stentz-i386-disc1.iso CD-ROM is in ISO 9660 format System id: LINUX Volume id: FC/4 i386 ftp #1 Volume set id: Publisher id: Data preparer id: Application id: FC/4 i386 Copyright File id: Abstract File id: Bibliographic File id: Volume set size is: 1 Volume set sequence number is: 1 Logical block size is: 2048 Volume size is: 320991 El Torito VD version 1 found, boot catalog is in sector 113 Joliet with UCS level 3 found Rock Ridge signatures version 1 found Eltorito validation header: Hid 1 Arch 0 (x86) ID '' Key 55 AA Eltorito defaultboot header: Bootid 88 (bootable) Boot media 0 (No Emulation Boot) Load segment 0 Sys type 0 Nsect 4 Bootoff 72 114 Thanks, Brian Hayward