Wi-Fi Connecting with a certificate

[pg2k3]

I want to connect to an access point at work which does not have a key but requires a certificate which is installed on my phone already. The problem is that the phone does not allow me to select that cert under the preferred network list like it does in Windows XP/Vista. Does anyone know how to get around this or a 3rd party wireless manager that will allow me to accomplish this. Thanks in advance