I hope you've found something useful in this guide, but as you can tell there's not as much "tweakability" in NFSHP2 as in some other games, particularly in the .ini department. Generally speaking, if the game looks fantastic then you can bet it requires a bit of PC grunt to get it running smoothly. There's no "magic performance tweak" for NFSHP2. I want to repeat that if you find the game "stuttering" or slow, particularly at higher resolutions/details, then it's absolutely essential that you optimize your system first. That means the right drivers, the right windows/file cache sizes, correct virtual memory size, making sure your hard drive is operating at its fastest, the right BIOS settings, etc. Sometimes a game brings out system limitations, and it seems the extremely high polygon counts, special effects and texture sizes in NFSHP2 can only be displayed smoothly if you get your system optimized.
Keep coming back to this guide as I update it for new patches and utilities, and in particular new tweaks. If you know of an important or useful tweak for NFSHP2 which I haven't covered here, please email me (click my name above) or post it on our Gaming Forums.
Finally, I want to give a big thanks to the Need For Better Speed Forums where I found some of these tweaks. Check 'em out if you like the Need For Speed series of games.