300 series upgrade

[Tony To Lam FSN]

I have couple questions regarding the system upgrade for the 4D machine.

1, Is it possible to mix 2 25 MHZ and 2 33 MHZ cpu in a system?
   If so, what would be the restriction on their use?

2, There is an option called 'Multibuffer' available along with the VGX.
   It provides an additional 64 Texture bit planes.  How do these extra
   64 bits work with the 32 bits already in the VGX?  Through what gl
   commands do you use to access these extra bit planes?

Could someone provide me the insight?

Thanks

Tony