I figured it out. I looked back through the comments on where I had gotten the addon and someone had mentioned (since my laptop isn't the fastest thing out there the game had preset all of the lowest graphics settings) that if the game crashes, you should go into the settings, and turn the "shaders" up one notch. I did this, and both CNC3 and Kane's Wrath work fine now. I how that this helps someone else out too.
Also, for reference purposes, the video stuff is: Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family and the driver date is 01/13/07.
L8. Dercas