Here's mine. I also use grub only.
title Vector Linux 6.0
kernel (hd0,5)/boot/vmlinuz-18.104.22.168 root=/dev/hda6 vga=791 splash=silent ro
where hd0=master HD and 5=partition
Important Note: Linux starts counting from 0 not 1. So if vector is on the 6th partition, it will be read as 5.