What you are asking is not possible and demonstrates that you do not understand enough about your system to be asking such a question, no matter how harsh that sounds.
To give a similiar analogy to your request to mix a Win 3.1 SVGA driver with your Win2K video driver when you feel the need, that would be as would the following:
You really like the power and responsiveness of your V-8 NorthStar engine powered Cadillac, but you occasionally have to drive to your mother-in-laws to make your wife happy. However, since you do not like making such visits, you want your local mechanic to temporarily remove the NorthStar V-8 engine and bolt on a VW Beetle four cylinder engine to your Cadillac so that your financial outlays from gasoline usage would be minimal for those uncomfortable unavoidable "visits". Oh, and put the NorthStar V-8 engine back in afterwards... Of course your local mechanic tells you in the nicest possible way that the world you are living in is not the real one the rest of us inhabit.
You see, the VW Beetle four-cylinder engine was NOT meant to to mated to a Cadillac engine bay and transmission, any more than a video driver from a previous Windows version or another video adapter would be expected to work in Windows 2000.
Either you find a Win2K driver that supports VESA modes that you desire, or you go without under Win2K.
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