Having trouble overclocking E8400 on P5N-D motherboard

Hello everyone,

I'm a beginner when it comes to overclocking, so if you explain anything please feel free to do so in baby steps.

This computer was my first build a while ago, and I've been proud of it. Recently I wanted to get better temps on my CPU so I installed a new heatsink for my CPU. Low and behold I was able to drop my CPU temps, I was proud, this was my first time doing this.

Now I wanted to try and get into OCing my CPU from the stock 3.0 speed to something just a bit more, such as 3.6 or 4.0 however I have no idea how to do this at all. So I decided to do some research and came across this video:

http://www.youtube.com/watch?v=KtcFNcpcnQY

Seemed easy enough, just copy what this guy did right? Well, I've been having some issues. When I do these settings without manually setting the RAM timing windows will freeze on bootup. Also if I set the RAM timing (4-4-4-12) I'll get a BSOD with an IRQ error I believe.

(EDIT: Also, this is the RAM I'm using, 4 sticks 1GB each http://www.newegg.com/Product/Product.aspx?Item=N82E168...)

I don't really know what I'm doing wrong or if following this video is a bad idea. I've also noticed that if I try to use the board's automatic overclocking feature (AI overclocking) it doesn't do anything. I remember when I did this on XP it worked, however now on Windows 7 it appears that changing this to have it do it automatically has no effect.

Also when I use the AI Overclocking feature it says it's running at 3.6 in the bios, but when I check windows or CPU-Z it says it's only going at 3.0

If anyone has any idea what I'm doing wrong or can point me in the right direction I would greatly appreciate it.