Install Linux Without Touching Mbr

Install Linux as normal. Some distribution allow you to create a boot floppy, so look for it. If you machine does not have a floppy drive, you maybe able to use your installation CD as rescue disc, or may need to download a separate rescue disc from your distribution. Anyway, boot using a rescue disc, and create a grub bootable CD:

1.  Download grub.iso
2.  Mount the iso somewhere
3.  Copy the 'iso' directory to /root
4.  cd /root
5.  edit iso/boot/grub/menu.lst (this is the tricky part, and outside the scope of this document for now)
6.  mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot -boot-load-size 4 -boot-info-table -o grub.iso iso
7.  sftp newgrub.iso to a machine where CD / DVD burner is available
8.  Burn the new iso using ImgBurn or another burner