User profiles

Hi,

I'd like to get rid of the User logon popup (not the
Windows logon one which I don't get as I never set a
password for this).

However if I just delete the only User I would be in
trouble because almost all software and hardware on my PC
has been installed under User "Justin". If I escape the
logon, my PC has no internet, half my programs don't work
and, where they do, any personal settings are lost.
Presumably, I'd be in the same situation if I removed the
user profiles thing.

Is there any way to move the settings? I've copied the
folders under Windows\Profiles\Justin to
Windows\Profiles\All Users and this makes the base (escape
logon) setup better but there's still lots of stuff
missing.

Do I have to muck around with the registry to do what I
want to do? How / what? Is it very risky?!!

Thanks in anticipation, for any advice,

Justin