How can I mount a fat filesystem automaticly as ubuntu starts?

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http://askubuntu.com – I have a dual boot System with an Ubuntu-Filesystem a Windows Filesystem and another FAT Filesystem on my harddrive. My Thunderbird configuration is on that FAT partition. I tried different tools, but they are mounting the filesystem as root, so thunderbird cannot read and write on it. Sorry for my bad english and thanks for your answers. (HowTos)