Quick answer for you - no.
Don't think you'll like that answer though. Your only solution is to install 2005 - which you can (apparently) do safely. Personally, I spun up a VM with 2005 tools on it for my 2005 dev stuff.
Todd McDermid - SQL Server MVP, MCSD.Net, MCTS (SQL08BI)
Find great SSIS extensions - most are open source - at SSIS Community Tasks and Components[/url]
Are you doing Data Warehouse ETL with SSIS? Don't use the slow SCD Wizard, use the Kimball Method SCD component instead.