Well ive had these problems ever since i started playing SA. I just never bothered asking for help :P. So..im getting strange graphic tearings on all of the pedestrian models..like sometimes you can see through them. The only model im not getting them with is with the CJ model :S. Some people on different sites have told me its because my graphics card is ATI Radeon? which i dont believe.
My computer specs:
AMD Sempron 2400+ 1,67ghz
512MB of RAM
and ATI Radeon 9250 series 128mb
I play SA with "Low" graphics settings
Heres some screenshots:


So could someone please tell me how to fix this problem? :P