I've had problems in the past making sure the custom icon we placed on the Visual Studio.NET splash screen was correct; if I had loaded the IDE previously, the splash screen would just flash by.
While spelunking through the VSIP help today, I found a way to pause the IDE at the splashscreen on startup: open a Visual Studio 2005 Command Prompt and type devenv /rootsuffix Exp /splash
This works with both Visual Studio.NET 2003 and 2005. Sweet!