Installation

Copy the kernel image vmlinuz and initrd from your new dist (e.a. xubuntu) to /boot/newinstall

The procedure for GRUB. Locate your menu.lst in the '/boot/grub/' directory and add the following lines:

title  New Install
kernel (hd0,0)/boot/newinstall/vmlinuz
initrd (hd0,0)/boot/newinstall/initrd.gz

and reboot.