The following doesn't seem to work even though it is what I was told to install by another owner of the same computer.

Sound: ALC861 - No sound
GFX: Natitx1300.kext - Screen goes black on boot

The sound, I might probably have the wrong driver, and I'm still looking.
But the GFX, my card is an ATI Radeon x1300 Pro, and that's the official natit driver for it.

My comp: Dell Dimension E521, if anyone has the same one and knows solutions.