Asus's only good DDR board (to this date) is the A7M266. It has been discontinued, while the stores that still have it in stock are charging $200 for it. I actually have an Asus A7M266 sitting here on my shelf. It was DOA, so I've got to get an RMA from Asus sometime this week. The Epox manual is about as descriptive as an Asus manual. The only thing that Epox skimps really bad on would be memory settings.
When it comes to the installation of drivers.. You need to install the latest VIA 4-in-1 drivers (1431'ish); install everything that is included with those expect the AGP driver. Once you have those installed, you need to download the latest AMD AGP Miniport drivers for the AMD761 chipset off of AMD's website.
EDIT- At this point in time, don't get the A7A266 unless you must. The Ali Magik chipset is just now getting to the point where its drivers are maturing. The AMD761 is the fastest DDR chipset as of right now, and it isn't any more expensive than the Via or Ali.