200m chipset?

I have the Compaq Presario R4000 with the ATI Radeon Xpress 200m. It's pretty much a worthless chipset. I've been told by countless individuals that it can't be upgraded due to it being integrated. After an investment of over $1000 into this notebook including minor upgrades, I didn't stop looking. I came across the following thread:

http://www.rage3d.com/board/showthread.php?t=33823959

I have a laptop (Acer Ferrari 4004) with the Xpress 200M chipset and the Radeon X700 Mobility graphics card

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Is it possible to open the notebook, and insert a more suitable mobile graphics card? The following page includes the specs of the notebook:

http://www.shopping.hp.com/webapp/s...=computer_store

Here's another thread I found for reference:

http://forums.amd.com/index.php?showtopic=43945

Scroll down to "I have a question about the HP zv6000 series."

Article: http://www.pcstats.com/NewsView.cfm?NewsID=40914

ATI's Radeon Xpress 200M, the latest in a new line of ATI chipsets for 2005, incorporates a graphics processor, along with a PCI Express connection for add-in cards

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