I would like to give some tips on how do you install CSSU on the N900. As we know, Nokia has already discontinued the production of the N900. Therefore the community at the maemo.org has came out with their own software update on the extisting Nokia software update.

And this software update is CSSU or Community Seamless Software Update.

First you will need to click on the image below using your N900 browser (which i assume you are browsing on your N900)

1. Hildon Application Manager (HAM) will launch and begin processing (be patient.. It took me around a minute to 2 before any messages came out).
2. While waiting please don’t press anything
3. There are a series of installations for which it will prompt you with messages and warnings. Click “Accept” and “Done” for each to install.
4. Once this is completed, close HAM and go into the applications menu. Tap the Community SSU icon. This will run through a series of scripts to ensure the community repository are set up.
5. HAM will re-open and present a system upgrade called Maemo 5 Community SSU. Once installed, your device will reboot.

Once installed, you can check your CSSU version at Settings > About Community SSU

You should see your latest version as 20.2010.36-2maemo13 as on March 27th 2011

You can always check the latest version HERE

Your power key button should have something like this. You should see the CSSU features at your power key button menu.