omiigosh!! i was finally able to get nitdroid on my nokia n900! thanks everyone for trying to help me, especially you topet2k12001. You were right, I just had to read the instructions carefully and not get too excited...but i also had to hard reset my phone before I was able to successfully install nitdroid. I was glad I did because that led me to realize what I was doing wrong...It turns out my application catalogue for extras-testing were wrong..

One last question, is it ok for me to switch between maemo and android without damaging my nokia n900? Thanks again!