For number one:

@datum = split /\n__BREAK__\n/, join "", <DATA>;
...
...
__END__
one item
goes here
and then
we break
__BREAK__
second item goes here
blah blah
__BREAK__
and then there's the third item!  Yeay!
hoho ho ho
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For #2, a bit tougher. use is compile-time, but your variable there is runtime. Just how early do you know the module name? At compile time, or do you need to wait until some of the "real" code has run?

And for #3, you need to output an <img src = "..."> tag, with a call back to the same, or a different, CGI program. There are examples in the mouse2 book.

And as for your explanation, look at Template toolkit in the CPAN.

-- Randal L. Schwartz, Perl hacker