I haven't had any problems with the SP27665
driver. I ran Chess with it and it does a decent job. Had to drop the resolution due to low video memory (16MB). Didn't surprise me, though.
You *HAVE* to extract the SP27665
driver with a program like WinRAR, don't just run the executable. Then, get the properties of your video card (probably Standard VGA adapter) and update it with this one.
I'll try it on my ThinkPad R40 soon, along with the Inspiron 5100.