touchpad scrolling resets mouse to 1 line at a time

[majro]

I mainly use external mouse, so I am used to scroll 6 lines at a time. When I set it in Windows to 6 lines at a time, it stays there until I scroll with touchpad or trackpoint. Then it sets itself to 1 line at a time. I can't find in the Ultranav settings how to control the scrolling speed of touchpad and trackpoint.

Although it is only a small issue, it is pretty annoying. I would like to know how to set it to those 6 lines.


My mouse is Logitech Mx518 with installed Logitech drivers. My system is Windows XP.

//edit
I know that trackpoint and touchpad scrolling can be disabled, but I like it and use it much when I don't have my mouse connected.