This is an alias to search using Ixquick and Startpage. They pride on being the most private search engines at the moment. To know more about their services, this post by Edvard may be helpful.
download the zipped file and extract the contents into Farr's sub-folder '\AliasGroups\Installed' or into '\AliasGroups\MyCustom'. Windows 7 users might need to check in the "My Documents" folder instead of the app folder.
if Farr is running in the background, you may need to open the Options dialog once for Farr to activate the alias.
to use the alias, simply type sp, ix or ixquick followed by your query.
tip: use Ctrl+Alt+ Enter to open both websites at the same time.
thanks to Edvard for the high-res icons.