http://www.gnutellaforums.com/limewi...e-answers.html
If the file is a zip, you need to change the extension from .zip to .lwtp

You will need to restart LW I think for LW to see it. There have been posts about this for vista users in that section.
These might help too
http://www.gnutellaforums.com/limewi...howing-up.html
http://www.gnutellaforums.com/limewi...elp-skins.html