Need some overclocking help!

[Deleted]

This is my hardware.
MS Windows XP Home 32-bit SP3
CPU
Intel Core 2 Duo E6400 @ 2.13GHz 50 °C
Conroe 65nm Technology
RAM
4.0GB Dual-Channel DDR2 @ 449MHz (5-5-5-15)
Motherboard
Gigabyte Technology Co., Ltd. 945P-S3 (Socket 775) 45 °C
Graphics
W2241 (1680x1050@60Hz)
1024MB GeForce 9400 GT (Point of View) 40 °C
Hard Drives
244GB Hitachi Hitachi HDT725025VLA380 (SATA) 26 °C
Optical Drives
SONY DVD RW DW-Q120A
Audio
Realtek High Definition Audio


My BIOS Setting:
CPU Host Frequency 356x8=2.84GHz
PCI Express Frequency Auto
System memory multiplier auto
Dimm voltage 0.3v
PCI-E overvoltage control normal
FSB VOltage 0.3
CPU VOltage 1.3000v

So what i ask is if i can improve it further.I dont have temperature problems at all.
My rams are 667Mhz.Is something above that i can modify to become better?I am all ears give me ur lights