I put a lot of effort into the quality and performance of our login script - one of the reasons it's used at so many global companies and educational facilities. In a recent deployment at a financial company, we brought the Citrix logon script time down from nearly 30 seconds to under 4.5, and the less complex desktop login script to under 2 seconds.
While many/most of the UDFs it uses are published on our web site, I don't always put those that provide us with a strong competetive edge into the public domain right away! 
Glenn
_________________________
Actually I
am a Rocket Scientist!
