Does the texture not show at all or is it displayed wrong?
First check that in 3D-view-window the option "Settings>Textures>Use Textures" is selected. Probably displaying of textures is unchecked there...
Else, did you change other hardware components or installed new drivers with the upgrade?
Try to switch rendering calculation to CPU (Force Software Rendering at "Options>3D View"). Maybe select a different "device" at the "Options" menu (see picture).
I have USE TEXTURES on the 3D view checked, It seems the program won't auto load up a TGA when you open a file, It only loads up the default thing, Then even when you manually add a TGA it still won't display it on the vehicle.
Here's the result, It finally shows the TGA but not to the vehicles, Rather as a backround, WTF
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Also I tried ALL the diffrent emulation settings, Still same end result, I tried:
RGB (slowed performance drastically)
Direct 3D HAL (No change but didn't slow performance)
BOTH NVidia GeForce 550 Ti settings (this should have had some effect as my graphics card is a NVidia GeForce 550 Ti 2 GB. but no change)
This is odd because it displays everything as should be on my LapTop.