gentoo -- grub.conf is a read only i need help soon please

I want to install gentoo and everything is going fine but I when i was up to the very last part!! (I did stage 1, so there were 23423 printed pages and setting up grub seems like the last page)

I have the following set up....
Windows XP- /dev/hda1
Linux boot- /dev/hda2
Linux swap- /dev/hda3
Linux root- /dev/hda4

I followed everything in the gentoo install perfectly and everything worked like it the manual said it should should, but I am not allowed to save the nano -w /boot/grub/grub.conf file.

To try to solve this I tried to overwrite the original grub by doing:
emerge -k grub
but this gave the error "emerge is not a command"

I am at a friends ocmputer, and would really appreciate any help somebody could give me on this subject

I have never used Gentoo, but I would say that "emerge is not a command" means that emerge is not installed, either fully or at all. Or that you need to do it all as root.

I was root, and several times during the install I used emerge program

If you are in the process of installing it, and it gave you that error you need to run this command before you can use the emerge command:

chroot /mnt/gentoo /bin/bash

If you already have Gentoo installed, then change the permissions on the file, so root can edit it.