$ wget http://people.debian.org/~aurel32/arm-versatile/vmlinuz-2.6.18-5-versatile
$ wget http://people.debian.org/~aurel32/arm-versatile/initrd.img-2.6.18-5-versatile

You also need to get the initrd of the Etch Debian-Installer:
$ wget http://ftp.de.debian.org/debian/dists/etch/main/installer-arm/current/images/rpc/netboot/initrd.gz