- Log into https://rhn.redhat.com/rhn/software/downloads/SupportedISOs.do
- Select the appropriate link for the most recent release for your architecture. For Red Hat Enterprise Linux 5.5 64-bit: https://rhn.redhat.com/rhn/software/channel/downloads/Download.do?cid=6957
- Download the “Binary DVD” image
- Burn the DVD image (.iso file) to a disc using software that burns DVD images (ex Windows Disc Image Burner, ImgBurn, or InfraRecorder)