C:\Documents and Settings\jim>set PATH=C:\progra~1\perl\bin;%PATH%

C:\Documents and Settings\jim>which perl.exe
C:\progra~1\perl\bin\perl.exe
C:\Program Files\Perl\bin\\perl.exe

C:\Documents and Settings\jim>perl -e "print $^X"
C:\Program Files\Perl\bin\perl.exe
C:\Documents and Settings\jim>