So here's what I've done to get myself a grub error 15 at boot:
1. I had XP installed on the system.
2. I installed Kubuntu 8.04, using the installer to resize the XP partition. I had no problems with the boot manager that it installed.
3. I decided I'd prefer Ubuntu, so I used its installer to reformat the partition that Kubuntu was on and installed. I believe my first problem was leaving the "install bootloader" box checked at this point.
After the Ubuntu install I rebooted to a grub 15 error. After reading lots of these threads I think I've got some of the relevant information ready by booting to the Ubuntu install CD:
sda1 is my Dell utility partition (48 MB)
sda2 is my XP partition (60 GB)
sda3 is the Dell media partition (3.4 GB)
sda4 shows Extended (12 GB, not sure where this came from)
sda5 shows Linux (12 GB, what I set up for Linux)
sda6 is swap (600 MB)
/boot/grub/menu.lst doesn't exist
This is on my laptop so there's only one SATA hard drive installed.
What do I need to do to get a boot menu set up so that I can select XP or Ubuntu? Are there now two boot managers installed?
I'm pretty green with linux so please spell out what I need to do. Thanks!