How to 'slim' down OO for pdf conversion only?

I'm using Open Office Portable to help accomplish document conversion task ( convert input files to pdf) in a .NET application that I'm building. Here is the great article:

http://www.codeproject.com/KB/office/PortableOpenOffice.aspx?msg=2668040...

All the things work fine, the only thing I wanna improve is the large disk space occupied by OO Portable. I find that there are many files and folders in the extracted Open Office Portable. It occupies about 500 MB. So I wanna know which files / folders are not needed if I just wanna use it for document conversion?

The version is 2.4.0