Thanks for clarifying how the IDE functions for all versions of UNO.  How to I install the correct UNO R3.inf?  Do I manually use the control panel>hardware>device manager>update driver to re-install the UNO R3.inf?  And if I do that, how can I get my FTDI driver back to run my Duemilanove on the same computer?

How to configure a new UNO Rev 3 board with a new install of IDE 1.0.  The tools>board menu has a Arduino UNO selection but the drivers folder has BOTH ARDUINO UNO.INF and ARDUINO UNO REV 3.INF?  There is no entry in the tools>board menu for REV 3.