hello. I just bought a nokia n900 (from witch i am typing right now) second hand (but is like new).
-first i want to do a memory cleanup to delete all previos user data (pictures,contacts,etc)
-second i want to root the device (i had a nokia e90 before witch i use to hack)
-i want to install multiboot to run meego, android, power kernel (my phone has v20.2010.36-2)
-i want to apply speed patch,battery patch, overclock,etc.

I dont know where to start, what to do first.I don't want to break something. I wait your advices.
Thanks in advance