use email as username

[SoftDux]

Hi all

I hope someone could help me. I'm new to Coppermine, and I want users to use their email addresses as username. I have searched the forums, but after the 14th page full of irrelevant info, I have to now ask

The registration process asks both the "username" & "email" - so I basically want it only to ask for email address, which will then be the username as well. Short of hacking the code (which I don't like, since it'll probably break other parts of the site, and upgrades won't work), how do I get this working?