You can get around the multitasking problem on the Mac by running multiple instances of the interpreter by creating runtime versions of your scripts. You can do this from the MacPerl save dialog. I have had success with this approach in the past with some long running data crunching scripts. If I understand the process correctly, creating a runtime version makes a copy of the MacPerl executable and adds your script and required modules to the resource fork of the MacPerl copy, so this can eat up quite a bit of diskspace. I would recommend creating a runtime version of your script and using one of the schedulers that Trimbach mentioned in an earlier node.

Hope this helps.

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Coyote