Shell Programming and Scripting

Dear all,
i have a lot of .pdf files that i need to reduce size with pdf2ps and ps2pdf app. I need a script which i can reduce file size of all .pdf files in every subfolder of WORKDIR folder.

folder tree like:

WORKDIR
SUBBWORK DIR1
SUB_SUB_WORKDIR1
1.PDF
2.PDF
3.PDF

SUBBWORK DIR2
SUB_SUB_WORKDIR2
ex.PDF
tx.PDF
rx.PDF

...etc...

Please HELP.

Not sure the pdf2ps command

Code:

find WORKDIR -name "*.pdf" -exec pdf2ps {} {}.ps \;