Just attempted the converter script on the website's game database and received a small error. It's nothing major but I cannot proceed until we work this out. I already contacted my programmer and he's looking into it.
The good news is I'm half-way through with the process
Apparently the problem is the result of the way that our current game software manages 'scores' and 'usernames'.
When a score is saved it saves/links the data to the 'username' field... but the wiser option would have been to save/link the data to the user 'id' field. The reason being, when a member changes their User Name, their scores are not carried over to the new name. So you end-up having scores in the database under old 'usernames' - just sitting there because they don't belong (aren't linked) to anyone.
When I ran the converter, it didn't know how to process this nomad
data so it halted (and gave me an error).