I managed to see some Pear PC OS X files on my Plus by the following route.

1) I first mounted a Pear PC folder on the PC as an SMB share

2) I then map this folder as a drive on the PC, otherwise PCMacLAN can't see it,

3) I then add this mapped drive to PCMacLAN's shared drives and folders list,

4) I sign in to PCMacLAN with Appleshare and then choose the folder which appears as a shared drive on the Plus's desktop but coming from OS X it's file icons are marked with some code and the letters PC.

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As a footnote, it puzzles me why you CAN share Zip disks but you CAN'T share floppy's?

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