http://imbacore.blogspot.com/2011/10/how-to-solve-rage-texture-streaming-pop.html
The guide contains the command lines that Nvidia listed. However, I toned down my graphics settings instead of placing what Nvidia laid out in its instructions. The result? Problem free gameplay. I'm currently uploading a video showing me playing the game. Will post it here too.
The guide also contains links to another resource that offers performance-enhancing tweaks for XP users.
Even with these specs:
CPU: Core 2 e7400 2.80Ghz
Motherboard: MSI P45 Neo3-FR
Memory: Kingston 2Gb DDR2-800
Videocard: 9800GT
I could only play at 640 resolution. Now I can play at 1024. Take note that my PC is a low-end machine.
I hope this will help some people.