can't make a rpm from radius sources

Hello all, I have downloaded freeradius-server-2.0.0.tar.gz and after intalling it, I made some code modifications to meet my expectations. Than I compiled again from the "src" directory using make && make install; after this, freeradius worked fine, as I intended; Now I would like to make a rpm from this modified version that I have. Could someone please tell me what steps should I follow in order to achieve this, a rpm from the modified sources. I would also like to preserve the modified configurations from the following files: eap.conf and users; and also two dictionaries that I manually added to the share/freeradius directory. Thank you in advance ! Cristian NOVAC.