MicrostockGroup

I had the same problem... not a completely automated solution but the best I found:

from the dos command line:

c:\>dir /s /b *.eps >c:\filename.bat

(/s lists subdirectories; /b outputs file name only without headers; >filename.bat sends output to file)

open c:\filename.bat with a text editor and replace text in each line
in order to replace <filename>.eps with pkzip <filename>.* <filename>.zip
you may have to do this part manually through copy and past but it's still faster

put pkzip.exe in the same folder (you need an old command line version of PkZip)

launch filename.bat

seems a bit crooked but saves time in the end

yes, the dos prompt can be scary but it's so cool!