I need to uninstall android from n900
 

hi,
i am new to android i dont know what i have installed fistly i try to install android but it install maemo power kernal the i install android gingerbread 2.1 it is installed but later i try to ugrade it by installing the gingerbread 2.3 NU12may but it not working now in the boot meneu it shows like that
2. maemo-kernal46
3. nitdroid 2.6.28_nit 06 on mmcblk0p2

i need to uninstall both of them and want to install android latest one can anyone please help me.