Don't be rude to guests martini.
Not everyone can understand or even likes that overclocking guide. It is way too involved for me and goes beyond what the average user wants or needs to know about a modest overclock.
Now to the OP: Welcome! Feel free to browse that guide if you like, but I would take a look
HERE.
First off, familiarize yourself with the manual that comes with your motherboard. There should be some overclock settings in the bios. Make sure your comp is stable at stock and a burn-in is recommended. Download some of the utilities below and get familiarized with your hardware. Take note of the speeds, voltages, etc. I even write them down as a reference.
Set PCIE to 100mhz, and watch your ram speed as it will change as you change the fsb speed.
You can begin overclocking by making small increases to the fsb speed while testing stability with a utility like Prime 95. Once you find your overclock is unstable, you can make small increases to the cpu voltage. Just be careful and watch the temps especially when using stock cooling. You should be able to get close to 2.6Ghz without any other changes.
Some utilities that I use are: Core Temp, HW Monitor, CPU-Z, GPU-Z, OCCT, Prime 95, Super Pi, SiSoft Sandra, Rivatuner, Lightsmark 07, and 3DMark06.
If you have any more specific questions, please don't hesitate to ask as there are many highly experienced overclockers here.