How to stream videos from a PC to a PS3?

Well I don't know how you "stream" from a DVD playing on your computer to the ps3, but here's what I do. I use a program called "PS3 media server" and I use it to stream .avi files, or just about any other movie file that I have on my computer to my ps3. Just google it and it doesn't take much setup, just download it onto your pc, and make sure your ps3 and pc are on the same wifi network, and your ps3 can find it and access most movie files stored on your pc.