Help changing Makefile for compiling LUFA 110528

I am having trouble compiling the latest LUFA (110528)for bootloader and USB-serial for my Uno (Atmega8U2).

I have followed the instructions in http://arduino.cc/forum/index.php/topic,111.0.html but this is for an earlier version of LUFA and the same method does not work with the new one.

The standard makefile in the LUFA downloads has MCU = at90usb1287. Just changing this to Atmega8U2 doesn't work.

Has anyone compiled the latest LUFA and if so, what variables did you change in the makefile?

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check the two clock speeds and memory address offset