Building Custom Installer for Foreign Architecture

[ms419@freezone.co.uk]

I need a custom installer to install Debian on my powerpc host; 
unfortunately, my only other host is i386. How does one build an 
installer for a foreign architecture?

I got debian-installer 20040801, using "apt-get source 
debian-installer".

I've cross compiled a kernel, made modules.dep using depmod.pl, & 
created powerpc udebs using kernel-wedge & SOURCEDIR=. I tried building 
a custom installer using "DEB_HOST_ARCH=powerpc fakeroot make 
build_powerpc_netboot"; it correctly tried getting powerpc packages:

[...]
./get-packages udeb console-keymaps-at console-keymaps-usb 
discover1-udeb discover1-data-udeb usb-discover 
ide-modules-2.6.7-powerpc-di nic-shared-modules-2.6.7-powerpc-di 
nic-extra-modules-2.6.7-powerpc-di socket-modules-2.6.7-powerpc-di 
nic-pcmcia-modules-2.6.7-powerpc-di pcmcia-modules-2.6.7-powerpc-di 
floppy-retriever pcmcia-cs-udeb floppy-modules-2.6.7-powerpc-di 
fb-modules-2.6.7-powerpc-di usb-modules-2.6.7-powerpc-di 
dhcp-client-udeb kbd-chooser bogl-bterm-udeb hw-detect ethdetect netcfg 
libiw27-udeb nic-modules-2.6.7-powerpc-di 
firmware-modules-2.6.7-powerpc-di 
firewire-core-modules-2.6.7-powerpc-di 
cdrom-core-modules-2.6.7-powerpc-di fs-common-modules-2.6.7-powerpc-di 
input-modules-2.6.7-powerpc-di firewire-core-modules-2.6.7-powerpc-di 
scsi-core-modules-2.6.7-powerpc-di languagechooser countrychooser 
iso-3166-udeb choose-mirror net-retriever load-installer 
cdebconf-newt-udeb rootskel-locale di-utils-terminfo nano-udeb 
libfribidi0-udeb busybox-cvs-udeb module-init-tools-udeb 
kernel-image-2.6.7-powerpc-di anna archdetect cdebconf-udeb di-utils 
di-utils-reboot di-utils-shell libdebconfclient0-udeb 
libdebian-installer4-udeb libnss-dns-udeb lowmemcheck main-menu 
rootskel udpkg
[...]

but then failed:

[...]
The following packages have unmet dependencies:
  adduser: Depends: perl-base (>= 5.6.0) but it is not installable
           Depends: passwd (>= 961025) but it is not installable
  apt-proxy: Depends: python-apt (>= 0.5.8) but it is not installable
             Depends: bzip2 but it is not installable
             Depends: logrotate but it is not installable
  aspell: Depends: aspell-bin but it is not installable
          Depends: aspell-en but it is not installable or
                   aspell-dictionary but it is not installable
  base-config: Depends: apt but it is not installable
               Depends: console-tools but it is not installable
               Depends: passwd (>= 20000902-6) but it is not installable
               Depends: bsdutils (>= 1:2.11l) but it is not installable
               Depends: debianutils (>= 1.6) but it is not installable
               Depends: gettext-base but it is not installable
[...]

I think it lists every dependancy declaring package installed on my 
host. All my installed packages' dependancies are met; I can build an 
i386 installer, using "fakeroot make build_netboot", no problem. I'm 
not sure exactly why it complains when trying to build a powerpc 
installer, so I'm not sure how to fix it.

How does one build an installer for a foreign architecture?

Thank you very much for any help!

Jack

PS. Debian is great! Debian Installer is great! Thank you, everyone, 
for your hard work!