Binary package hint: grub-installer

I currently installed ubuntu9.10 w/o any obscurity from a disc on a PC with MS-XP installed. But once I sought to modify the grub installer, the file /boot/grub/menu.lst is not being located. I searched about with "ls" but no file first with menu was in the directory /boot/grub. The root password was received w/o a trouble.

My PC has a Dual Core 2.93 GHz/sec CPU, along with 4GB of RAM plus a 500GB hard disk with a 100GB MS-XP partition as well as a 250GB Data partition with the rest of 150GB unallocated prior to the Ubuntu installation. I would like to alter the default OS choice to MS-XP until I learned as much as necessary regarding Ubuntu. How can I attain my objective?

I have used command line UNIX/Linux for more than 40 years but not at all set off to X-Window.

My ideal boot would make use of a floppy to open Ubuntu as well as no floppy to begin MS-XP (or else the other way around). I have that on a very old PC with a command line Linux system, but I do not remember how I did it. Is that Lilo? What Ubuntu installer would I want to do the same for Ubuntu?