Gregg writes: "New addition of the wonderful marc-record manipulation tool marc.pm [1]. This one has the added feature of being able to name the HTML fields when using marc2html. Thanks MR. Summers!" Complete docs and a line-by-line tutorial example are available at marcpm.sourceforge.net [2].
Links:
[1] http://search.cpan.org/search?dist=MARC-1.13
[2] http://marcpm.sourceforge.net/