ATI Radeon Xpress 200 overclocking issues

[TheRagnarok]

I was in dire need of overclocking info on this chipset.
Here is the info of the chip. And the motherboard it resides on is
the Asus A8AE-LE

General Information :MOTHERBOARD
Manufacturer : ASUSTek Computer INC. (Asus)
Product : Amberine M
Version : 1.03
Serial Number : MB-1234567890
Support MP : Yes, 1 CPU(s)
Version MPS : 1.4

General Information :INTERGRATED GRAPHICS
Manufacturer : ATI Technologies Inc (Hewlett-Packard Company)
Model : Radeon XPRESS 200
Bus Type : PCI
Total Memory : 128 MB
Texture Memory : 117 MB
Processor : ATI RADEON XPRESS 200 Series (0x5954)
Converter : Internal DAC(400MHz)
Refresh Rate (min/max) : 56/85 Hz

Video Bios Information :
Date : 05/07/19
ID : BK-ATI VER008.043I.008.000
ATI Catalyst : v 6.30

I really need help on this subject becuase I have tried SMARTGART but to no avail....I have also tried RadLinker but my pc auto-shuts-down after i set the clock a little(due to overheating I suppose).There is a heatsink on the video ram but there is not one over the GPU(there is a place to solder some clips on though so I could get a chipset cooling kit from CompUSA).
So could anyone help me out with this overclocking issue on the ATI Radeon Xpress 200
NorthBridge : ATI Radeon RS482
NorthBridge : AMD K8 Bridge
SouthBridge : IXP SB400 PCI-ISA Bridge

(Specs were obtained with PC Wizard 2006 from www.cpuid.org)

[edwin]

You have an HP machine right? I think that apart from the bios they skimped on a thing or two which makes it impossible to overclock this puppy.

[Denniss]

Overclocking the graphics core usually doesn't help anyway because it's mostly memory bandwidth limited.