[all variants] Looking for a Win 98 replacement

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http://ubuntuforums.org – I have an old Toshiba Satellite 2210 that is running Win98 that I'm looking to recycle. According to Win98 it has 128.0 MB RAM, 5.58GB HDD Capacity. I'm looking for a basic Ubuntu Based distro that will run smoothly on it. Something that is as much Ubuntu as possible. Any suggestions? My other idea was to turn it into a basic firewall. (Hardware)