Configuring RADIUS for EAP-PEAP-MSCHAPv2, EAP-GTC and EAP-TLS

Hi, I need to configure RADIUS for EAP-PEAP-MSCHAPv2, EAP-GTC and EAP-TLS. How can I produce the certificate for them. How do I specify what certificate to use for EAP-PEAP-MSCHAPv2 and EAP-GTC. Thanks & Regards Gaurav