>>> So, is there a technique or an open source tool that >>> will create a dvd iso given the cd iso images? >> I've seen the DVD ISO files on select mirrors. it can be >> difficult to reliably transfer a> 4GB file over http/ftp I've only had one DVD iso dowload corrupted over http. I use a fast mirror and d/l overnight with a wget bash script, run by cron. #! /bin/bash # the command to download the iso shows in qps as 'wget' #------------------------------------------------------# # SITE_URL is the url of the site to download # WAIT_TIME is the time to wait in seconds between downloading files # DOWNLOAD_DIR is the destination for the downloaded files #------------------------------------------------------# OS_VERSION="5.5" SITE_URL="http://www.mirrorservice.org/sites/mirror.centos.org/$OS_VERSION/isos/i386" DOWNLOAD_DIR="/downloads/linux/centos/$OS_VERSION/DVD" #------------------------------------------------------# # get the CentOS 5.5 DVD md5sum.txt file. wget \ -a $DOWNLOAD_DIR/wget.log \ --directory-prefix=$DOWNLOAD_DIR \ $SITE_URL/md5sum.txt # get the CentOS 5.5 DVD iso file. wget \ -a $DOWNLOAD_DIR/wget.log \ --directory-prefix=$DOWNLOAD_DIR \ $SITE_URL/CentOS-$OS_VERSION-i386-bin-DVD.iso #------------------------------------------------------# exit 0 Always md5sum check the iso is downloaded OK, and if you burn to a DVD+RW disk, you can then reuse that many times. HTH Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------