MS Access 2003 - distrubute runtime

Hi all, after many loops around the MS websites, I am in need of your help. I have been tasked to develop a distributable MS Access 2003 database in runtime form. Client restricitons mean it has to be Access 2003 - No choice. The ADE are no longer bundled and we keep being directed to VSTO 2005 (VSTO 2003) not being available. We have Visual Studio 2005 - Professional, what does the VSTO 2005 SE do, and do we need to purchase VSTO 2005 (crice ?500).