Great, welcome to Panda3D! 
Too bad you got a bit of a rough start. 
To clarify the confusion: the NVIDIA Cg Toolkit has nothing to do with NVIDIA graphics adapters. They’re two completely different products that both happen to be made by NVIDIA. The Cg Toolkit is a piece of software that compiles files written in the Cg shading language to a target driver format, which can be a vendor-neutral format like ARB programs or GLSL, and will work on any graphics hardware, be it Intel, NVIDIA or AMD.