Feel free to download from http://www.floating-point.net/ancestry/genopro/(Look in the table for the utility lines and fetch the selectgenomaps.zip file.)
The instructions are provided in the program itself, by means of four different tabs: Pre-processing, input selection, output selection and post-processing.
Note (1) - I just realized the output it generates is ANSI. I'll try to provide a UTF-8 version this weekend.
Note (2) - The tool is written in Visual Basic (VB6) with the latest service packs installed. It's possible Windows complains about you not having the right run-time version or DLL. Just Google for the file(s) and follow the instructions. You'll be fine.
Questions, remarks and suggestions can be left in the replies to this topic.
Enjoy,Nand