Sure, it can't hurt (they're relatively small downloads). Also, by trying both, you help others who might have the same problem. Even if the first one works, please try the second as well to see if it works too. Oh, and while using them, make sure you've done these other fixes to make absolutely sure it doesn't work.
AceMastermind wrote:Some things to note:
Try to run ZE with 3D-Analyze
Try updating your graphics card drivers
Switch your graphics to Highest 32 bit
Try turning off Aero Glass
Try right clicking on the exe and "Run as Administrator"
Try disabling User Account Control (UAC) for administrators
In terms of the graphics, try alternating between 16 and 32 bit, not just the highest.
Oh, and make sure it's the 3.5 for SP1 (assuming SP1 is installed for your Vista), not just 3.5.