Heh. Well, there is quite a bit involved. I'll try to break it down into like three steps or something like that (at least I'll try).
1. You musthave the appropriate hardware. You have a good start with your Duron and your A7V. Just make sure you have good cooling for them.
2. You then have to setup your hardware. This means connecting the L1 bridges on the Duron as well as setting up the jumpers on the A7V. The bridges can be connected using HB pencil lead or pretty much anything conductive. I have doubts about the durability of the pencil, so i'll be posting info about that later in another thread. As for the jumper settings, you want to have jumperfree mode off. Make sure that with Jumperfree mode off, your core voltage, FSB, multiplier are all correct. You will also want to set the board's voltage to 3.3 instead of the default 3.5. Runs cooler and just as stable (more in spec too).
3. The third step is obviously start OCing the thing. I'd advise you get something like WinNT or Win2K working first so you can see whether it boots or not (reason for the NT kernel is that its more prone to dying on a bad OC). Then start adjusting the multiplier up from 6 to 6.5, to 7, to 7.5 etc. until it won't boot anymore. Then you can start adjusting the voltage up until it boots again. When you get to the highest multiplier where it appears to run stable. Leave it at that for a while to see if it does indeed run stable. If yes, you can choose to up the FSB too.
I think that's all there is to it. I'm sure someone will add if I forgot something. (Wow! OC your computer in three easy steps!)