Is it possible to run rgrep in emacs on Win32?

[Steinar Bang]

Platform: emacs 23.2.1,
          GnuWin32 FindUtils 4.2.20-2
          GnuWin32 Grep-2.5.4

Does anyone know of a way to make the emacs rgrep command work on
windows?

I'm trying to run `M-x rgrep RET' on a windows emacs.  I have installed
find and grep from GnuWin32 ( http://gnuwin32.sourceforge.net/ ) and put
them early in the PATH.

When I try to run rgrep it exits with no match, and in the *grep* I see
the following error message:
 C:\ProgramFiles\GnuWin32\bin\find: invalid expression; I was expecting to find 
a ')' somewhere but did not see one.

The command line is:
C:\ProgramFiles\GnuWin32\bin\find . "(" -path "*/SCCS" -o -path "*/RCS" -o 
-path "*/CVS" -o -path "*/MCVS" -o -path "*/.svn" -o -path "*/.git" -o -path 
"*/.hg" -o -path "*/.bzr" -o -path "*/_MTN" -o -path "*/_darcs" -o -path 
"*/{arch}" ")" -prune -o "(" -name ".#*" -o -name "*.o" -o -name "*~" -o -name 
"*.bin" -o -name "*.bak" -o -name "*.obj" -o -name "*.map" -o -name "*.ico" -o 
-name "*.pif" -o -name "*.lnk" -o -name "*.a" -o -name "*.ln" -o -name "*.blg" 
-o -name "*.bbl" -o -name "*.dll" -o -name "*.drv" -o -name "*.vxd" -o -name 
"*.386" -o -name "*.elc" -o -name "*.lof" -o -name "*.glo" -o -name "*.idx" -o 
-name "*.lot" -o -name "*.fmt" -o -name "*.tfm" -o -name "*.class" -o -name 
"*.fas" -o -name "*.lib" -o -name "*.mem" -o -name "*.x86f" -o -name "*.sparcf" 
-o -name "*.fasl" -o -name "*.ufsl" -o -name "*.fsl" -o -name "*.dxl" -o -name 
"*.pfsl" -o -name "*.dfsl" -o -name "*.p64fsl" -o -name "*.d64fsl" -o -name 
"*.dx64fsl" -o -name "*.lo" -o -name "*.la" -o -name "*.gmo" -o -name "*.mo" -o 
-name "*.toc" -o -name "*.aux" -o -name "*.cp" -o -name "*.fn" -o -name "*.ky" 
-o -name "*.pg" -o -name "*.tp" -o -name "*.vr" -o -name "*.cps" -o -name 
"*.fns" -o -name "*.kys" -o -name "*.pgs" -o -name "*.tps" -o -name "*.vrs" -o 
-name "*.pyc" -o -name "*.pyo" ")" -prune -o  -type f "(" -iname "*.csproj" ")" 
-print0 | xargs -0 -e grep -i -nH -e "searchterm"

Parantheses seems to be balanced...?  I haven't installed xargs, I
think... unless that's part of FindUtils...?