Vista Tutorial - Reverse Administrator/User Accounts?

(Running Vista Ultimate 64-bit, SP-1, IE-7, classic mode.)

I currently have an administrator account I'll call AAA.
I currently have a user account I'll call BBB.
(I also have a guest account, turned off, which can be
ignored for this post.)

On account AAA I have done extensive personalization
(changing icons, removing some from desktop, etc.) which I
want to retain. Account BBB is just as it was produced when
I created it, and has rarely been used.

Heretofore I have used account AAA all the time, and have
not used account BBB. I have since been advised not to
operate in an administrator's account (AAA) for security
reasons, and that it is better to operate in a user account
(such as my BBB).

So, I'd like to reverse my two accounts, with BBB becoming
the administrator account, and AAA becoming my regular user
account. Here is how I propose doing that, and I'd like
some feedback on any risks or problems foreseen with this
scenario:

Change account BBB to be an administrator account. Then
change account AAA to be a user account. Then change name
of account AAA (temporarily) to CCC. Then change name of
account BBB to AAA. Then change account CCC to BBB. When
that process is complete I'd have account AAA with all my
current personalizations, but as a user account; account BBB
would be the plain and simple account, but the administrator
account hardly ever used.

Anyone see any problems with that approach? If I do this
will my security be better, in terms of protection from
viruses?

Other relevant comments welcome.
--
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CWLee
Former slayer of dragons; practice now limited to sacred
cows. Believing we should hire for quality, not quotas, and
promote for performance, not preferences.

"CWLee" <cdubyalee@xxxxxx> wrote:
I've never heeded that advice... and even have UAC turned off.

I have so many backups of my entire system that I don't worry about
such matters... and my computing is SO much easier.