Actually, if you have permissions to put any perl script up on your web site, then you have permissions to put up Modules, just not in the "normal" place.

Try this:
* make a dir called myModules
* make a dir called HTML inside it
* copy Template.pm into it from CPAN (or do it the proper way and have the installer install into your myModules dir)
* In your script do:

#
 use lib "myModules";  #this example uses a relative path
 use HTML::Template;

# do real stuff here
[download]

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Nothing is too wonderful to be true
-- Michael Faraday