You must edit models/__init__.py such that:
import X from Y
app_label = 'foobar'
May be it should be automated (model loader)?
For instance, the model loader could parse the directory tree and import all necessary info it needs(meta information, optional), all is needed is a function for it :-/
edit: Format, gramer :)
Phah! OK. I'm gonna do it. Automatic model loader function, Django extension :) (May be next week...)
However, for those interested in model package loading automation, I started a section on reddit: http://www.reddit.com/r/django/comments/d1ulg/automatic_mode..., may be I'm wrong...
Sorry for bothering you...