How to do it
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There are a few applications out there that allows you to control the startup process (including the startup of applications not in the Startup folder).
The one I've been using for a few weeks now is freeware 'Startup Delayer' by Australian r2 Studios (screenshot to the right). It allows you to set the delay for each of the applications started with Windows. It also has a panel displaying the time line of the startup process.
Other "no-cost" solutions I bumped into but haven't tried are: Startup Delayer by Jockersoft.com, R4U Soft Start.UP Organizer by R4U Soft, Ss Startup Manager by Ss-Tools, and Startup Optimizer by Cyberlion Solutions.