Before you go buying Model Pack 38, thinking you can run it, you need to know you don't just get Shader 2.0 with the pack, that's not how it works at all. Shader 2.0 is the shader technology in your video graphics card for your computer. Shader 2.0 is advanced and comes with newer, more expensive and powerful video cards. Model Pack 38 just simply has shaders that
utilize Shader 2.0 technology in these better graphics cards (although it's not really "simple", there was tremendous work put into it by bond1 to get those shaders created).
Anyways, if you're unsure whether you're video card can handle the pack (which you really should check before purchasing it), you should hop on over to the official thread for the pack
here and look. It's been discussed throughout the different posts in that thread, what kind of video card is required to run the pack smoothly, or even at a bare minimum. If you still aren't sure, I'd post on there asking bond1 or email him specifically with your system specs and type of card.
Cheers
Life would be much easier if I had the source code.