Active Directory for 'Account Expires'

Here is what I am looking to do:

Once a year our users are required to take a CBT on computer security/use. We are setting the 'Account Expires' date to one year from the date they complete the training.

We would like to silently script out a way to have a pop-up notify them 10 days prior to the account expiring each time they log on.

I did find this:

http://www.jsiinc.com/SUBQ/tip8000/rh8075.htm

but it takes 5 minutes to complete (we have ~20,000 users) and it returns a lot of errors before it completes.

Any help would help.

Got it!