Good monks:

I have a group of scripts that comprise a small CMS that I install for various customers. Each script (there are 12 so far) starts with

#!/usr/bin/perl -T

use lib "/home/username/www/perllib";
use Validate;   #little module for validating form input
etc.
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This means that each time I install it I have to physically edit each use lib statement. It would be nice to have one place to edit. I naively tried to keep the path in a text file and insert it as a variable:

#!/usr/bin/perl -T

my $pathtolib = &opentextfile;
use lib $pathtolib;
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and even crazier:

#!/usr/bin/perl -T

my $pathtolib = &opentextfile;
eval(use lib $pathtolib);
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I found a module called "FindBin" which I read about in the "Cookbook" but my host doesn't have it installed (I'm not sure it would find my modules as they are in an unconventional directory, not related to the cgi-bin file--but that is conjecture since I can't even try it at this time). Anyway, is this possible by some other means? Thanks.