Were do we find the old budy list to recreat a new one?
It depends on a lot of things - your OS, the version of the client you used, etc.
Sorry I can't give a more definite answer.
ok Windows xp, English client
Even that isn't enough. Java 1.3, 1.4, or 1.5? Java web start or windows-only application? They all can make a difference.
And in the end, there's a good chance I can't tell you anyway. For java 1.4+ and for java web start, I just tell java to store the info, not where to store it, so I have no idea where it is put.
There's some discussion of how to do this on the page CgobanProblemsAndSolutions. I don't know how well it works, since I didn't use the buddy list.