Your hope to "somehow precompile the code, for wider compatibility and for source protection,...." isn't one you can satisfy with an executable Perl script. Simply can't be done. If it can be executed, you can do no more than obfuscate.
As to the request from the individual who "tracked (you) down," it'll be a lot easier -- IMO -- to provide code, the DB and its contents, and the HTML/CSS and let that person bring it up as a working site with whatever mods are required for whatever purpose the requester has in mind.
A small website will fit easily enough on one or perhaps 2 CDs; but for any real utility, I suspect the whole shooting match needs to go on a server, even its only for an intranet.
Afterthought: I've been assuming that the supliant specified that your work run under Windows and from a CD. That may have to be negotiated. But as far as being "linux/perl-based" I see no reason that the code won't be compatible, unless you are using *nix-only modules like, say, IO:stty or something that has such a module in its requirements.