Damn what GFX-Card are you running at?
If you're still using a DX7/DX8 card i suggest you to go and buy a new one with DX9 support.
But i guess it's not only your out dated GFX-Card.
I mean i could run Source Games just fine on my old rig too without problems.
The only game i had some trouble with was FarCry coz of unsuported shadders, the graphic looked kinda weired and it did things like grass decals instead of the muzzle flash, but with patch 1.3 everything worked just fine (except of the framerate on high settings).
Anyway, you should stop reporting things which are related to your graphic.
What's Next? Someone who tries to run the mod at his C64?
Seriously, be sure to meet the OB minimum system requirements and have up-to-date drivers before complaining about anything related to graphic.