xsetroot -cursor_name

[flevour]

after a 6 months use of knoppix, i decide i wanted to customize it a bit, so i downloaded some cursors for the mouse. raeding documentation on the net i found the command is xsetroot - cursor_name left_ptr (for example), but it cants seem to be working. where does the config of knoppix set this value to its own cursor?
thanx for attention,
flevour