All Credits goes to thedead1440 from Maemo Forum for writing this guide for us.
Please donate to Hildon Foundation to cover cost for running Maemo.org servers: LINK For Original Thread
As you all know that Maemo.org repositories are not working but there are already alternative repositories working without any problem. If you can't wait till maemo.org repositories are back online then this guide is for you. I don't know about these alternative repos but they are online and you can also install apps. A little working as usual:
I WILL NOT BE RESPONSIBLE IF YOU DAMAGE YOUR PHONE OR BRICK IT
If you agree to the above notice then guide will begin after the break.