Yes, all works now, and the solution for me is the following:

To run poison to add your own speed cameras to the original DVD 2010 HIGH on Windows 7 (32 bit) you need the gtk2-runtime-2.14.7 version. it is the file gtk2-runtime-2.14.7-2009-01-13-ash.exe available from:

Browse GTK+ for Windows Runtime Environment Files on SourceForge.net

Make sure you right click and select "run as administrator"

Regards, foobar.