about adding new attributes

Hi All, I am new to the Radius world. But i have one requirement. I wanted to add one private attribute to the Free Radius server. So Let me know how should I will be going to do this. I need to modify the RADIUS cleint to send the request with the new attribute and reply from server shall include the values for it. Sorry I am asking questions directly related to the code. But it will be helpful for me to understand it faster. 1) How to add the new attribute in the Dictionary 2) Where I need to handle the parsing for it. (File name) 3) Where shall I handle the processing of attribute? Is there any standard mechanism to do it? Or guidelines to do so? Thanks in advance. Best Regards, Wable