According to Mel Seder:
To delete an entry do I merely delete from the beginning of a title section to just before the the next title section starts?
As an example if I wanted the 2.4.18-10debug entry deleted would I highlight
title Red Hat Linux (2.4.18-10debug) root (hd1,0) kernel /vmlinuz-2.4.18-10debug ro root=/dev/hdb2 hdc=ide-scsi initrd /initrd-2.4.18-10debug.img
all of the above OR all of the above MINUS the hcd=ide-scsi line?
Your first assumption is right. The "title" keyword begins a new section, and the following lines (indented for clarity) are all part of that same section, so you would delete them all together.
However, if those lines were created by the installation of a particular kernel RPM, the removal of that RPM (with "rpm -e") would also modify the grub.conf file accordingly. It's all a question of how/why you want those lines removed, but under normal circumstances, you rarely have to edit grub.conf yourself under Red Hat Linux.