search for: creating_a_rhel_bootable_dvd_iso

Hi; how to convert 7 cd iso images into one dvd image? I am unable to use bittorrent :-( Home ISP blocking bittorrent; company now blocks bittorrent. I want/need an old release (CentOS 5.2) to install as a VirtualBox guest. I suppose I could install from the cd iso images, but it is a pain to virtually eject and remount cd iso images during the install :-( So, is there a technique or an open