E6300 overclock

[Lethal`]

A while ago I got my E6300 to 2.8GHz but i'm wondering where I go from here to increase the overclock even more. Some screenshots that could be handy:

 

[Lethal`]

Do I need to just up the FSB without changing anything first? As when I did this overclock I followed some guide that said when it gets to 400FSB I would have to start fiddling with memory to overclock higher.

Also when I boot it says my RAM as PC2-4200 instead of PC2-6400

 

[Lethal`]

might need to loosen the timings on the memory as they are running at their specified speed at the moment.

might need to adjust memory and chipset voltages slightly.

Could you explain that a bit more please? What would I loosen the timings to etc...