I think you can use a compiled applescript. And a compiled applescript can include 
do shell script "/some/unix/command with args | here to | there >outpu
+t";

[download]
so it might be inconvenient, but at least you can fire your arbitrary script this way.

-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

In reply to Re^2: Can files with extension ".command" on MacOSX be perl scripts? What is a way to let users execute Perl scripts on macosx from Finder? by merlyn
in thread Can files with extension ".command" on MacOSX be perl scripts? What is a way to let users execute Perl scripts on macosx from Finder? by Anonymous Monk

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