Suse SNORT rpm and new rules

Hi everyone, I have installed the snort.rpm from the 7.1 DVD however on the snort site I have found new rules. After I downloaded the rules file the way they are listed are different than the ones that were provided by the SuSE rpm. Forexample in suse there is a overflow-lib while I could not find the overflow.rules. Where does SuSE get the rules/libs so that When I add rules I will stay compatible in a future update -- Togan Muftuoglu