Have you tried this alternative method? http://wiki.centos.org/HowTos/InstallFromUSBkey The unetbootin technique may be suffering from an Anaconda bug: https://bugzilla.redhat.com/show_bug.cgi?id=568343 On 26 Nov 2010, at 1134, Werf, C.G. van der (Carel) wrote: > Hi, > > I’m trying to get Scientific Linux 5.5 installed from USB-key, since my system does not have a working DVD player. > I used “unetbootin” and “SL.55.051810.DVD.i386.disc1.iso” to create a bootable key. The tool extracts the installer files from the ISO to the key. > > Booting the key the SL5.5 setup program keeps looking for an “.ISO” file, in stead of looking at the extracted files on the key. > > How can I pinpoint the installer to look at the key ? > > PS. Since the ISO-file is over 4 GB it can not be copied on the FAT32-usb-key ! > > > With Regards, > > | Carel van der Werf | Developer/Administrator ICT-Bèta | Department of Science | Utrecht University | > >