Hi rhinouser141, the display of points can be modified by updating some bitmap images, see here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=9868.2

But that will only control the appearance, not how close you have to be for it to be targeted.

For that try modifying this in moi.ini :
[View]
<...>
SelectionHitTestRadius=12

- Michael