Precaching and Texture Streaming

Hello

I'm new her, i bought the game... Yesterday. And I have a problem: loadings are really really long. The "precaching" part during loading lasts 10 minutes or something, sometimes even 15 minutes, and not only for the first game i played...

I read about texture streaming, and tried to enable it, but it looks like it has been suppressed or something, it doesnt appear in graphic options.

My pc isn't really great but i've got some games who works really well, and when the loading finally ends, NS2 turns at 45/50 FPS in medium/high settings. Also, loadings last 1/2 mn on my laptop, so i guess it's not my internet connection.

My config is:
Intel core 2 duo E8400 3 GHZ
3GB RAM
Nvidia GeForce GTX 650
Windows xp SP3

Somebody can help me please?