live passports

I have several pc's in a school with potential of 1500 students using them 
for msn.
I'm trying to clean up the registry files, most of which i have written a 
script to do this.
I have found that under the
HKU\%sid%\Software\Microsoft\MSMMessenger\PerPassportSettings
I have very many sub keys more than I would expect for just MSN use.
What are these extra keys and is it safe to remove all the sub keys under 
this main key.
Failing this is there a way to work out what sub keys are associated with 

Greetings,

Each key under what you've specified is a Messenger ID for each user who's
logged in.  For 
instance, if you use this tool on my site:
http://messenger.jonathankay.com/msngrid.aspx
type in your own address (or another if you want), and you can see the exact
"Messenger ID" 
that's generated.

Feel free to remove them -- they'll just be re-generated when that user signs in
again.

-- 
Jonathan Kay
Microsoft MVP - Windows Live Messenger
MSN Messenger/Windows Messenger
MessengerGeek Blog: http://www.messengergeek.com
Messenger Resources: http://messenger.jonathankay.com
(c) 2008 Jonathan Kay - If redistributing, you must include this signature or
citation
--



"SuperSlueth" <SuperSlueth@discussions.microsoft.com> wrote in
message 
news:84176E0E-24EE-4F32-AF90-24EAF370E240@microsoft.com...
> I have several pc's in a school with potential of 1500 students using them
> for msn.
> I'm trying to clean up the registry files, most of which i have written a
> script to do this.
> I have found that under the
> HKU\%sid%\Software\Microsoft\MSMMessenger\PerPassportSettings
> I have very many sub keys more than I would expect for just MSN use.
> What are these extra keys and is it safe to remove all the sub keys under
> this main key.
> Failing this is there a way to work out what sub keys are associated with
> users that have logged onto live MSN messenger.