It is not pretty, but I have worked out the following work around:

1) Using the Finder "Find..." menu, do a search for all .mp3 files in the iTunes folder.

2) Select all the resulting matches (should be all the mp3 files you have in iTunes...).

3) Drag the selected files to another disk - this pretty much means you need a partition, second disk drive, file server, whatever.

4) in the Finder, re-select all the files you just copied and move them into the Shared Folder (whatever is selected in LimeWire as the shared folder).

5) Open Limewire and click on the Library tab. The files all show in red until Limewire goes through and 'loads' the files.

Problems: It would be easier to just "copy" the files from the "Find..." search results, but when I did this, Limewire would not accept them (? no idea why). If you copy drag the files from the search results, it will move the files, not make a copy of them (i.e. no more mp3 files in iTunes...).

An option I did not try: I found in the "Preferences" option (under the "Limewire" menu) the "Share" option. You could, in theory, simply select the iTunes folder, or even the entire "Music" folder and make it a second shared folder. This would be the most elegant solution but I had already fixed my problem by the time I found the &%%$* place to add shared folders (a smarter man would have tried this first...).

Hope it works for you - please let me know!

James