How to use Haiku as an access point?

My ISP uses a custom router that limits my connections to said router to a maximum of three. I’d like to connect a wifi access point to the custom router, so I could connect however many devices to said AP and the custom router would only see one.

I could use a dedicated router or access point for this, but I don’t happen to have one. I do, however, have an old EeePC 701 currently running the latest dev of Haiku. Ethernet and wifi are both working. How do I configure it so as to connect to the Internet via Ethernet, and accept connections from other computers on its wifi?

I know I could do this via Linux, but I’d prefer to use Haiku if at all possible because it seems to suit the little 701 so much better.

This is probably something a specialized system like smoothwall would be better suited for, since it uses a web interface only and has no GUI on the host machine it runs exceptionally well, even on an old pentium 3 like I am using for my hardware firewall / router.