Creator: Simon Sabin
(from an internal unsupported Microsoft tool)
Description: This program will downgrade an SSIS 2008 package to a 2005 version. It will only downgrade Microsoft tasks and components provided in-the-box with SQL Server Integration Services. If you have any custom tasks or components, those will not be downgraded (although they still may work). This utility will downgrade the Lookup component successfully. This utility will NOT downgrade SSIS 2008R2 packages that have ADO.Net Destinations.
Main Project Site: SSIS Downgrade on CodePlex
Source Download: SSIS Downgrade on CodePlex, Source Code Tab
Binary Download: SSIS Downgrade on CodePlex, Releases Tab
Instructions: SSIS Downgrade Wiki