Correct me if I'm wrong, since I'm not familiar with Outlook forms. But
aren't they similar to Access forms? That is, you've got controls on a form
with VBA code behind? If so, then no, there is no easy way to convert them
into InfoPath forms. You'll have to manually recreate them in InfoPath,
unless you write an InfoPath converter that will convert them for you (not an
easy job to do). While Word and Excel documents may contain code, their main
parts are just data. If Outlook forms are anything like Access forms, they do
not contain data, but mainly code to retrieve/submit data, so there is no
easy conversion to InfoPath there.
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S.Y.M. Wong-A-Ton