Hey Greg, thanks for the response.
So what I want to do specifically is write forms for infopath 2003 with Visual Studio 2005 C#. I'm not sure this specific feature of VSTO 2nd Edition is compatible with office 2003, do you know?
From the MS website:
http://www.microsoft.com/downloads/details.aspx?FamilyID=5e86cab3-6fd6-4955-b979-e1676db6b3cb&DisplayLang=en)
"Microsoft Visual Studio 2005 Tools for the 2007 Microsoft Office System ... is an add-on to Microsoft Visual Studio 2005 that enables you to build application-level add-ins for applications in the 2007 Microsoft Office system and the Microsoft Office 2003 System.
VSTO 2005 SE includes support for Microsoft Office InfoPath 2007 form template projects, previously available as a separate product known as the Microsoft Office InfoPath 2003 Toolkit for Visual Studio 2005. You can now design InfoPath 2007 form solutions right in the Visual Studio 2005 environment if you have InfoPath 2007 installed on your computer. "
See it keeps mentioning 2007 specifically with regards to Infopath :(