I was going crazy picking chpater thumbnails in DVDMF using that tiny
little slider bar for a 2+ hour MPG, so I wrote a little utility to
help with picking thumbnails. It has saved me quite a bit of
frustration, so I thought others might benefit from it as well. You
can find it at...
Just run MFScene.exe while you are using DVDMF. Whenever you open the
"Change Thumbnail" window, MFScene will come to life and help you move
around the video and select a thumbnail.