From the series of the SQL Server 2005 Service Pack2 Cumulative Update packages blogs and for instance we blogged about SQL2005SP2CU5 earlier, it is available to download now and before that there is a catch to obtain this package. It is not that easy to download files from the Microsoft download site, you have to submit a Online Customer Service request to obtain the package, go to ThisLInk and submit further details. Before that a brief advice on going towards upgrading your SQL 2005 SP2 instances...(
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Read the complete post at http://sqlserver-qa.net/blogs/tools/archive/2007/12/24/sql-server-2005-cumulative-update-5-for-service-pack-2-available-for-download-with-a-request-to-css.aspx