lesstjm,
I have seen at least two other postings on this same topic from you.
The policy for this website is to only post topics once. Please try not to post your topics more than once.
Someone else gave you a good answer to this as follows. Not mine but very good.
find dir -type f -exec compress {} \;
This will find and compress all files of type -f (file) not linked.
If there are any *.z files it will ignore them or ask if you want to recompress them but it will not hurt those files.