[gentoo-user] altgr-intl keyboard layout

Hi,

from here I learned the altgr-intl keyboard layout:
http://dry.sailingissues.com/us-international-keyboard-layout.html
which I will try. It seems to be a good choice for daily
programming and writing (I need german Umlauts...;)

Instead of altgr-intl: Is there a windows equivalent, for
which I can search to find a howto to establish this 
kind of keyboard-fu on my keyboard at work, where there
is no Linux reachable?

Thank you very much for any help in advance!
Best regards,
mcc