Well the delay could be the system checking the non-existing=damaged file systems, nevertheless a full flash is what is the way to go. Could be that this will fix that partitioning scheme.

I intended to make the second partition larger for you, to skip this part while installing nitdroid. Here is the wiki article about flashing: http://wiki.maemo.org/Updating_the_tablet_firmware

Feel free to ask, if you are having difficulties with the article or the flashing procedure. Everyone is willing to help you succeed.