So as I was doing the nitdroid install and when I rebooted into the multi boot menu and selected nitdroid my phone turned off . When I tried to boot back on I got nothing at all, just the white nokia screen. Anyway I attempted to reflash my device and I honestly cant even get past installing flasher 3.5 in ubuntu 64bit. I read a bunch of posts and the wiki but Im completely lost. please help!

Try and hold the 'o' key when you turn on your phone. This should skip the multiboot menu and boot straight into maemo.

if that doesn't help have a look at the Nitdroid help and tutorial thread.