Manual package download and installation

Hello!

I use MiKTeX with a few additional packages (like koma-script), and with switching from XP to Win7 and some new network rules in my company automatic package download does not work anymore. I would like to download the needed packages manually (using Internet Explorer) and install them from the local hard drive.
How can I do that?

I read the recommendation to use the net installer, but I can't set its proxy settings either.

With best regards
Hartmut Niemann

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