Old PC Parts

I just found an old PC from I dont know how long ago but I was wondering what are my options for making something out of it? Like a router or something?

It has:

Intel Pentium 4

A mobo that fits that chip not sure on exactly what it is

Creative labs soung blaster live!

40GB HDD

Floppy drive

ODD

256 MB of ram

Some power supply, couldnt tell its wattage by reading the label (didnt look too hard)

Those specs would be adequite for a pfsense router if it has a supported nic or if you have a nic you can add in. Heres the video if you havent already seen it. 

http://www.youtube.com/watch?v=Q0JFfpG4BWI

Idk what happened with my last post, but heres the url: http://youtu.be/Q0JFfpG4BWI

Ya thats what I think Im going to do. I remember watching that video and thinking I wish I had an old PC laying around...