Need help with intel celeron 440 Overclocking

[mRt0x1c]

Hey i got old pc with intel celeron 440 2.0 Ghz,3 gb ddr2 ,nvidia 240GT 1 GB GDDR5,Asus P5VD2-X,Artic Frezer Pro cpu cooler,Ok so im kinda new to overclocking i oced my video card so how far you think i can go with artic freezer pro cpu cooler can i get to 3.0 Ghz im runing Windows XP Home Edition,Normal Temps are 24 C,Full load 35 C

 

[mRt0x1c]

i have voltage control what valtage should i set for higher also forgot my ram is OCZ 1066 mhz working on 667 mhz so it can take oc