I can understand your wanting to tinker with it, but for the office I think you'd be well advised to look at an appliance. You don't have to fiddle with firewall settings or anything like that, you just assign the device an IP address and tell it where your gateway is (i.e. the SMEServer); DHCP, I have found, works just fine for the wireless clients. Full network functionality, almost instantly.
I think you will have a LOT more aggravation troubleshooting any access problems if you hack this capability into the SMEServer. But if you take it on, heck, write up a HOWTO. Good hunting!