If it is on the internal n900 memory then use mount /home /and

that is if you installed it to /home when installing. This is the default location because that is what the instruction guide thread on here said. Be careful to not delete any maemo files though. I'm sure someone more knowledgeable can write the exact command in order to do that........?

Or would uninstall nitdroid command work when you are in this directory. Is that safe? It wont delete the nitdroid kernel will it, if for example you just want to go back to using nitdroid on an external card?