Hi,
There are many ways to find out the version
as you see in the other postings.
To get all information about apache and mod_perl add
<Location /perl-status>
SetHandler perl-script
PerlHandler Apache::Status
Order deny,allow
deny from all
allow from <your.ip.address>
to your httpd.conf, somewhere between your
tags.
After restarting apache, browse to:
http://<your.virtual.host>/perl-status
This gives you information about mod_perl,
you’ve never dreamed of. 
JR