Now that make sense your just using the functionality of karma not karma as a whole. so setting up nocat isn't going to have an effect on the clients associating, once their connected to the SSID of there choice thats when openwrt takes over and issues them a IP (dhcpd) and accepts there dns requests. So if I set up openwrt as a captive portal it won't have any affect on the clients connecting to jasager.
I'm gonna give this a try and I'll try to do a write up for all those interested. If they don't mind my spelling.
Thanks digininja