Like Part is a SharePoint 2007 web part in a solution (WSP). To install it, use stsadm. This webpart also need a custom list to be created. Follow the next steps to install it:
  1. On your root Site Collection site, create a Custom list.
  2. Change the Colunm Title name to Url
  3. Add a colunm called Identificacao (Default colunm type, text)
  4. Add a colunm called User (Default colunm type, text)
  5. use the following stsadm command to add the feature: *stsadm -o addsolution -filename file directory/LikePart.wsp
  6. use the following stsadm command to deploy the feature: stsadm -o deploysolution -name LikePart.wsp -url your site url -immediate -allowgacdeployment
  7. if necessary, use the stsadm -o execadmsvcjobs
  8. Enable the solution on your sharepoint site collection and enjoy. Add the Like Part to you pages and test it!


- ps: Users which will use Like Part need Colaboration permission on the custom list created.