I have been looking at editing ages use artmony and i have had some success of late. This how i have been doing after starting a new game we know from the datat.db it gives you a player ID such as Ian Bell's is 9E 00 which if you take it out of hexidecimal the number is 158 00. So if you search for a sequal of 4 and put in 158 00 158 00 and then go memery editor you should be able to see his birth date which is DD 40 out of hexidecimal it is 221 64 and you need to change the DD\221 to change his age. After the search for 158 00 158 00 if you get moore than 1 you can then search for the cub number aswell in Bell's case it would be 16 so you would be searching for 158 00 158 00 16. You can also change the club number but it just says they are at the club you change it to but dosn't change which club they reprisent. I have also looked for Nat and skill but have found noting. Anyway hope this help and works. 
