[AUCTeX] Using preview not everytime AUCTeX is used

[Martin Buchmann]

Hi all,

i was just wondering if it would be possible to load preview-latex conditionaly,
i.e. use it sometimes when AUCTeX is loaded and sometimes not. Background is
that i'm working sometimes on "plain" LaTeX documents for which i want to use
preview and sometimes on literate programming (noweb) files which use LaTeX in
their documentation chunks. I want to use AUCTeX but not preview in this case
and would like to be able to "unload" it somehow so that the menu doesn't
appear. It's not really harmfull to have a menu that one doesn't want and need,
i was just wondering for sake for elegance.

Any ideas are appreciated
  Martin