Cisco 4500/6500 switch

Hello Freinds,
I have two querries:-
1)
a) What would be the effect if one SUP is removed (out of two) from Cisco 4500/6500 series switch.
b) what is the result after removing both SUP from cisco 4500/6500 switch.
++++++++++++++++++++++++++++++++++++
2) PLease share the step wise process for upgrading IOS on 4500 switch (with 2 SUP card).

http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a00801461ef.shtml

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    The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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