A few friends and I wanted to play on this map a bit, but when we started, one of my friends didn't have CS:S. So I thought, "Okay, I'll buy him CS:S, he'll install it and run it once, and we'll be good to go." I did that, he ran the game once, and then we started everything back up. I set up the server, he joined, textures are still missing. Any advice? Is there anything else we need to install to fix this? Quick help would be appreciated.