Force display driver in Win7?

I have and old WinFast A250 and there are no supported drivers for it on win7, on vista I could just go update the drivers manually from the device manager and use the old ones, but on win7 it says:

"The best driver software for your device is already installed"

It's the "Standard VGA Graphics Adapter" driver.

Is there a way to force it to use the other drivers?

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