I accidentally deleted someones question about rexx.........
Here's a site that could help:
http://www-4.ibm.com/software/ad/obj-rexx/

I can't remember what OS your on so you might want to know that AIX has an awk
script that can parse the prepare file:
/usr/lpp/adsmserv/bin/planexpl.awk.smp

Hope I helped, if not re-post your question so I can look at it again.

Dave