1. Create FulText catalog
2. Execute command:

CREATE FULLTEXT INDEX ON dbo.Files(content TYPE COLUMN extension)
KEY INDEX PK_id ON dmsFTCatalog
WITH CHANGE_TRACKING AUTO

3. You can view filters when the following commands are executed:

select * from sys.fulltext_document_types

select * from sys.fulltext_index_columns

4. Download .pdf filter: http://www.adobe.com/support/downloads/detail.jsp?ftpID=2611.

5. Execute the following commands against your Sql Server 2005 instance.

sp_fulltext_service ‘load_os_resources’,1. This command tells the Microsoft Search Service to load OS specific wordbreakers, stemmers, and such.

sp_fulltext_service ‘verify_signature’, 0. Do not verify that the binaries are signed.

6. Bounce the Sql Server Service and MSFTESQL.

7. Issue the necessary command(s) to (re)index:

exec sp_fulltext_catalog ‘dmsFTCatalog’,'start_full’

useful links:

http://weblogs.asp.net/wallym/archive/2005/02/28/382060.aspx

http://jtkane.spaces.live.com/Blog/cns!33DA9EBF0ACF8558!537.entry

http://arcanecode.wordpress.com/category/sql-server-full-text-searching/