If all that you want to do is change the levels of indentation
of points, subpoints and subsubpoints you only have to modify
the parameter
itemsize.
This parameter is a dimension stored away in TEX's memory
and items are indented 1.0
itemsize, subitems are indented
1.75
itemsize and subsubitems are indented 2.5
itemsize.
The current value of
itemsize is 30pt (30 points);
however, you can change this by simply typing
itemsize = 40pt
or whatever else strikes your fancy.