Using emerge on windows? Funky errors with Temp files

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Hi all, 

Is there a trick to getting emerge to work on a Windows machine?  I installed
GetGnuWin32 for my Gnu tools, set up my paths (am able to run "ls").  Then I
loaded two files and tried to emerge-buffers, but get the following error:

diff: c:/DOCUME\~1/webbs/LOCALS\~1/Temp/emergeA4208Vv8: No such file or 
directory
diff: c:/DOCUME\~1/webbs/LOCALS\~1/Temp/emergeB4208e2I: No such file or 
directory

There is output in the *merge* buffer, but it is just one of the files.

Note -- I am an emerge newbie, so, um, be gentle..

Tx!