Hopefully this info helps:
-You can find out roughly what graphics card you have by going to the Start Menu, choose Run, and type "dxdiag" then press Enter. Wait for the box to come up. Go to the Display tab and it will say what type of graphics card you have. It doesn't always tell you the exact model number because graphic card companies often have many models in a given product line, but at least you get a name.
-Pixel Shader and Vertex Shader are both processing units on the graphics chip (roughly speaking, in reality it's probably a combination of hardware and driver software). If your graphics chips doesn't physically support the version of shader that the game uses, the game might not run, or it'll run really slow, or it'll run but some graphic features will not be available. You never know though, so it's still worth a try to get the latest drivers and try to run the game.
-Games typically don't include graphic drivers. You can always get the latest graphic drivers from the graphic chip manufacturers website. So if the demo doesn't work with the latest drivers, the full game probably won't either.
-There are definitely PCI graphics cards that support Pixel Shading. The latest version of Pixel Shader is 3.0, but I don't think most game need this. You can definitely get PCI cards that support Pixel Shader 2.0, which will probably run Wildlife Park 2. These cards can be bought for around $70 or less.
-The Intel 865GV Chipset uses the Intel Extreme Graphics 2 graphics. According to Intel, it supports Directx 9.0:
http://www.intel.com/support/graphics/sb/CS-004697.htm...Which means it might support Pixel Shader 2.0 (since Pixel Shader 2.0 is part of Directx 9.0). So damien551, you might still be in luck, although my guess is the game will run pretty slow.
EDIT: Wildlife Park 2 only needs Pixel Shader 1.1.