What to use?

I'm looking at setting up a web server / file server using an old 350mhz processor in a machine with 64mb of ram. I've stumbled upon both FreeNas and Openfiler and both of these are extremely appealing and the web-interface feature is an absolute must. These options, however don't appear to be web servers. I want to know what would be the easiest way to set up a web and file server for the older hardware, with a web based interface.

I guess that using the webmin interface could be the answer to my question. Will FreeBSD run on my old hardware? It appears to be pretty good for the uses that I need. Will the webmin interface provide me all the control that the FreeNas interface would?