I installed SQL Server 2008 Express with Advanced Services, but when I try to create a new database, the option Full-Text indexing is greyed out, I believe the full-text indexing has been installed, because I did a query as below:
use [mydbname]
select fulltextserviceproperty('isfulltextinstalled')
This query returns 1, so I think it has been successfully installed.
Full-text indexing is supported in MSSQL Express with Advanced Services edition, which I have installed. Page for reference:
http://www.microsoft.com/downloads/details.aspx?familyid=B5D1B8C3-FDA5-4508-B0D0-1311D670E336&displaylang=en