Yes. Both the onboard graphics and the Nvidia graphics card are not supported by the game. So to answer your question, I see no way to avoid getting a better graphics card to play your game.
From the LucasArts website FAQs:
Q: Will the program work with my TNT/TNT2 chipset video card?
A: The TNT/TNT2 chipsets will not run the program. Those are older chipsets that do not support the functionality required for the game.
Q: Will the program work on a system with an Intel 82810/82815 onboard video card?
A: The Intel 810/815 chipsets do not meet the minimum requirements to run the program. The program a card that supports hardware T&L (Transform and Lighting), and the Intel 810/815 chipsets do not have the required DirectX functionality necessary to run the game.
Check for yourself.
Click here.