PES 2010 - Become a Legend Editor | 5 Mb
This editor will allow you to edit the ability/age/card index/name/position ...(basically anything) of your Become a Legend player to ANYTHING you want, and it works PERFECTLY!!!
Make sure you back-up your PES2010_BL01.bin file before you edit, just in case.
It's in Chinese but I have included a MANUAL to help you understand and use this brilliant tool.