Hi I copied the centos 5.2 x86_64 DVD to a USB pen drive formatted for FAT32. I then ran syslinux -sf /dev/sdc1 to get it to boot. I mounted it, and did cp isolinux/vmlinuz . cp isolinux/isolinux.cfg syslinux.cfg the setup the MBR. THe device booted but I got an error message about unknown command in the syslinux.cfg file. Isnt syslinux and isolinux compatible - they are in the same package? All these commands below look correct. Did I do something wrong trying to get a USB pen drive to boot to install linux from. Jerry ---------- default linux prompt 1 timeout 600 display boot.msg F1 boot.msg F2 options.msg F3 general.msg F4 param.msg F5 rescue.msg label linux kernel vmlinuz append initrd=initrd.img label text kernel vmlinuz append initrd=initrd.img text label ks kernel vmlinuz append ks initrd=initrd.img label local localboot 1 label memtest86 kernel memtest append -