Hello there. Welcome to LQ.
Unfortunately, It's been ages since I used a RedHat distro (RH9 was the last one for me), so I don't really know what software your RH server includes. If you have a DE, you can use K3B in KDE or brasero in GNOME.
In the command line, if you have growisofs
, you can use it to burn iso images:
growisofs -dvd-compat -Z /dev/dvd=image.iso
Just replace /dev/dvd
if it's not appropiate for your system. Read the growisofs
manpage for further information.