As I said on my previous post (http://blog.hametbenoit.info/Lists/Posts/Post.aspx?ID=301), I updated my MOSS platform with the Infrastructure rollup's, which include search updates.
If you want to add federated search to your MOSS platform, it's pretty simple.
First, go to your Shared Services administration web site and click on the search administration link. As you can see, the search administration pages have been updated to provide simpler search administration.
PS: I deleted 'sensitive information' such as service user account and server name J
Then, click on Federated Locations link available on the left part
By default, you have only 3 federated search location: Internet Search Results (which request Live Search), Internet Search Suggestions and Local Search Suggestion.
If you want to add Internet search engines (such as Google, Live, MSDN, Technet…) you have to add a new location. If you don't know how to configure a new location, you start y downloading the sample available here http://go.microsoft.com/fwlink/?LinkID=95798. The location configuration is an XML file.
Once you have downloaded the sample you want, or created your own, click on the Import Location button

Your federated locations should be like this
If you want to change the default settings (for example, define a specific search engine to use depending of the keyword), click on the link related to the federated location you want to update
At this stage, you have prepared the basics. Now you have to add the federated search result available to your users.
To do this, you have to update the search result page on your Search Center (results.aspx). If you want to update the result page for ALL your search center or if you want to update your WSS search results page (osssearchresults.aspx) you have to do this on the file system on all of your SharePoint server – DON'T FORGET to do a backup before doing anything
So, go to your search center and perform a query to display the result page. Then, with a user account which has administrative rights, open the Site Actions\Edit Page menu.
Then add a webpart (where you want to display the federated results) and choose the web part Federated Results available on the section All webpart\Search
To finalize the configuration, you have to edit the web part to define which federated location to use, the number of results to display…
You have to repeat these steps to add more than one federated results.
Enjoy the new search in MOSS J