ttls+eap-md5

Hello,all! Please help!I've to resolve this problem before tommorrow. My task is to cofigure the freeradius using TTLS+EAP-MD5 to authenticate users.I've found much information about how to configure this type on Internet,but there are some differences between different vesions. My freeradius version is:2.1.7 Please tell me the specific steps to configure the freeradius.Which files do I need to modify and how?Thank you very much!