Rated 4 out of 5 stars

I've modified the installer so it works on Thunderbird 5. Here is the link to the download. Copy and paste URL into Browser -------------------------------->
http://www.megaupload.com/?d=HSTHCC17 <----------
All credits go to the author.

Lastly here is a good guide if you need to modify any addons for Firefox or Thunderbird to run on newer versions:
Copy and paste URL into Browser ---------------------------------------->
http://www.techsupportalert.com/content/how-update-firefox-thunderbird-addons-new-release.htm <----------------

This review is for a previous version of the add-on (4.2.0.1-signed.1-signed).