Wireless access point and Ebox

[colinkhalid]

Iam planning to set up the following system with two Internet connections with ebox

router one to eth0

router two to eth1

eth2 connects to wired LAN

The question is how do I setup a situation where ebox can accept multiple incoming WiFi connections ?  (access point style) as a number of the users will be connection their laptops via WiFi.

I thought of having a third network card (eth3) and connecting a wireless router to it.
This router would not have an Internet connection but simple route the Internet and LAN resources.

all advice and pointers welcomed , thanks in advance