Vista - Set-mailbox like powershell cmdlets with the Exchange 2003 Server

Hi,

i work as an exchange administrator and we have to set limits on per user
mailbox (not for each storage group because this gave us a lot of database
wasted space problems) and I started to use Powershell on my machine to get
some reports.

I know that Exchange 2007 comes with Exchange Management Shell and you can
do this natively...

There's no problem on going on every AD user account properties, but the
challenge is that the number of mailboxes is high (around 2000) so doing this
is a though (I'm a lazy admin) task..

Is there any third pary cmdlet to SET exchange 2003 properties or any WMI
method or anything else I can do to avoid doing manually?

Thanks in advance,
Salvador.