Certainly you can build your own Apache(/mod_perl) to run off a CD.

But watch out for the files Apache has to have write access to! (Like its own pid-file, log files etc.)
You probably want to wrap the startup command into a script (Why not Perl ;-)?) to set up the directories you need.

My advice: Set up Apache to use some directory in the system /tmp for lock-, log-, pidfiles.

And you could even find some filesystem for your CD that is supported on multiple platforms and put an Apache for each of those platforms on the CD - so no matter what, your clients can use that CD.

The other reason of course is to show them how cool you are ;-). I always find that important, too.

Regards,

janx