[MiKTeX] Miktex 2.4 packages

[<aeb...@in...>]

I have removed Miktex 2.3 for a clean installation of
version 2.4. but I have noticed now, and for my surprise,
that packages like elsevier or kluwer, that were included in
v. 2.3, do not appear now in the packager manager. I would
like to know why this happened and how could I overcome this
problem quite fast and simple.

Thanks a lots and best regards,

Agustin