> I would like to install NetBSD onto a running Linux/FreeBSD system.
> My Idea looks like this:
> I thought about creating a RamDisk and moving a stripped down Iso File
> (which is ready to run) into the Ram on the running OS. Then Execute it
from
> there, dd'ing the Harddrive with the iso file and reboot and pray.
> Is that possible? (in theory?)
> Or are there already solutions of that kind?
> What for? 
> There are servers which cannot boot into rescue Mode or some kind of
rescue
> Bios, to install another OS.
> A lot of companies are offering cheap Linux Root Servers. I'd like to
> install NetBSD on one of them.

There is a HOWTO for OpenBSD on a Strato-Rootserver at 
http://www.dettus.net/openbsd_at_strato.txt
maybe it fits for NetBSD too.