First, make sure that the HD(s) is/are being recognized by OSX. When you're sure, go to Limewire's Preferences and click Saving and add the folders that you want to share from the HD(s).

You may, of course, have already tried this so this post may be worth zilch.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-