the core.zip file works .. when you installed the program if you clicked all users .. the path that you need to put the core file in is C:\Documents and Settings\All Users\Application Data\Lavasoft\Ad-Aware 2007 -- not the program directory like the help file says in the program .. you can also double check this by clicking the settings of webupdate .. and it shows the path .. 
Do what he says and your definitions file will update itself correctly. Thanks brian29.
