there is actually a software called meecatalog in wich you can add repos just like the n900, with the update you can see on the blow of the settings a "+" button where you can actually add repos, and a button that says "tap to select" for well known repos, it gives you 3 know repos, or you can add manually, i will try to add n900 repos to test the comptability issues with the missing libs maybe i can be able to download a fully functional program compiled for n900 with its dependencies, wish me luck