How to convert a Wireless B router into a switch?

So I have a linksys wireless B router sitting here doing nothing. My friend needs a switch, He has 5 PC's to plug into a 4 port router. Thus the need for a switch.

I'm pretty sure you can disable something on the wireless B router to just use its switching capability, and allow the first router to do the DHCP work.

I would appreciate it if someone could confirm this and give me a little guidance on how to achieve all this.

aight nice. thanks ^^ dude.

I knew saving that thing would be worthwhile