Hi there,
I don't own GPSTuner so I didn't do much in that direction unfortunatelly. So the answer is don't know.
Miha Markič [MVP C#]
RightHand .net consulting and software development
www.rthand.com
blog: http://cs.rthand.com/blogs/blog_with_righthand/default.aspx
www.dxsquad.com
www.codezone-si.info