I currently have the stock 2.66 GHz base 2009 Mac Pro, and was looking at doing some upgrades. For all of you hardware vetrans out there, I had a few questions about processors:
Can this board be installed on the quad model to replace the single-socket board?
Can the new board be run as a single ship system until I can muster up the money for another CPU and heatsink?
^and would doing so allow me to take advantage of the extra RAM slots?
Can the board be run with two chips at different clock speeds?
Does the Octad setup require different processors than the quad allows (I know people have has success with Core i7, but I have heard horror stories involving fried logic boards and integrated heat spreaders)
Is doing the upgrade cost effective? The site provides all of the materials required for the job and even extra processors.
Any input would be appreciated

Can this board be installed on the quad model to replace the single-socket board?
Can the new board be run as a single ship system until I can muster up the money for another CPU and heatsink?
^and would doing so allow me to take advantage of the extra RAM slots?
Can the board be run with two chips at different clock speeds?
Does the Octad setup require different processors than the quad allows (I know people have has success with Core i7, but I have heard horror stories involving fried logic boards and integrated heat spreaders)
Is doing the upgrade cost effective? The site provides all of the materials required for the job and even extra processors.
Any input would be appreciated