All I did (last night): Download the tiny easy debian scripts from AppMan: Let it do it's business: Click blue button to download - click on MMC and let it do it's business. I switched the screen off and watch King of Queens for an hour. Came back - DONE! LXDE glory!

Maybe the automated system on N900 is the easiest and best way.
It is all automated. You click 'OK' 3 times and select MyDocs or MMC once.