"Snow Leopard Graphics Update report
Although the early 2008 Mac Pro is not listed, the update also applies to that machine.
(I asked what GPU/card he had installed (I'm guessing a Geforce 8800 or GTX-285). Apple's "About" doc (see below) only lists some mac models - not all the affected GPUs from this driver update.")
The GPU driver went from 19.5.8f03 to 19.5.9f02. However, I am back in that situation I reported before (after applying the GTX-285 update for 10.6.4 back in June) where the CUDA driver needs an update and it is no where to be found. See attached screen shot.
-TH

Snow Leopard Graphics Update (65MB)
The Snow Leopard Graphics Update contains stability and performance fixes for graphics applications and games, including fixes that:

• address frame rate issues occurring in Portal and Team Fortress 2 on certain Macs
• resolve an issue that could cause Aperture 3 or StarCraft II to unexpectedly quit or become unresponsive

For more information about this update, please visit this website: https://support.apple.com/kb/HT4286
System Requirements: Mac OS X 10.6.4"

To save you a click here's the info from the HT4286 doc ("About the Snow Leopard Graphics Update"):

" Summary The Snow Leopard Graphics Update contains stability and performance fixes for graphics applications and games in Mac OS X v10.6.4.

Products Affected (This list of affected macs is not complete - it is not a list of all the GPUs that use the drivers in this update. For example it does not list earlier models that could have a GTX-285, 8800, 4870, etc. card installed.)
MacBook (13-inch, Early 2009), MacBook Pro (17-inch, Mid 2010), MacBook Pro (13-inch, Mid 2010), MacBook Pro (15-inch, Mid 2010), iMac (21.5-inch, Late 2009), Mac Pro (Early 2009), Mac mini (Early 2009), Mac OS X 10.6.4, Mac mini (Mid 2010), iMac (21.5-inch, Mid 2010), iMac (27-inch, Mid 2010), MacBook (13-inch, Mid 2010), Portal, StarCraft II, Team Fortress 2

What's included?
The Snow Leopard Graphics Update contains stability and performance fixes for graphics applications and games:

Addresses frame rate issues occurring in Portal and Team Fortress 2 by Valve, on iMac (Late 2009 and Mid 2010), Mac mini (Early 2009 and Mid 2010), Mac Pro (Early 2009), MacBook (Early 2009 and Mid 2010) and MacBook Pro (15-inch, Mid 2010) or MacBook Pro (17-inch, Mid 2010) models.

Resolves an issue that could cause Aperture 3, or StarCraft II by Blizzard, to unexpectedly quit or become unresponsive.

Resolves an image corruption issue that may occur when disconnecting and reconnecting external displays while the system is running."

• 27-inch iMac a world-class desktop... also a blazingly fast gaming machine (chron)
• Is the iPad now cannibalizing the Mac? (fortune/cnn)
• Laptop e-mail tipped Apple to kickbacks plot (computerworld)

• About the Snow Leopard Graphics Update (no longer online)
• OS X Server v10.6: Junk mail filter always bounces messages marked as "banned"
• Mac iMovie Camcorder Support