There is a new and special version of the 9w installer, the OBI-9w installer

This version is made for very old computers without PAE capability. The One Button Installer in run from the 9w installer's debian system. Now there is a super light-weight installer, that can

- install from CD, DVD and USB
- create not only single boot but also dual boot systems.

Prepare partitions with Gparted and run the One Button Installer at the advanced level to create dual boot or multi boot system.

There are special tarballs for the 9w installer, and these tarballs come with the iso file.