[Sarge d-i] Skipping installation components?

["Durk Strooisma" <durk@kern.nl>]

Hi all,

Just wondering if there's an easy (or hard) way to skip installation
components.
I would like to skip the following components during a _preseeded_
installation of Sarge:

partitioning

  - I will run a script which does the partitioning itself
    and create mounts in /target.
  - Reason: recipes are too complicated (I don't need
    calculations, just wanna have fixed sizes) and too
    limited. If you think there's a better way to achieve
    fixed size partitions in stead scripting myself, please
    let me know.

tasksel

  - I will install additional packages scripted with apt-get.
  - Reason: even though I don't select any tasks, still a lot
    additional packages get installed. I just wanna end up with
    a clean (base) system and only install the few extra
    packages I really need. "manual package selection" results
    in the startup of aptitude which breaks the
    non-interactivity of the install. So just skipping tasksel
    completely seems to be okay.

I tried to investigate the installation flow, but it's rather hard. I
couldn't quickly determine a location where the flow can be configured. Any
hints?

Thanks in advance!

Durk