How do you change the colour of the cursor to WHITE for a BLACK background ?

[Dove.John]

I would like to use SN4.5.2, but I can't see the cursor with the colour
scheme I'm using. My preferred colour scheme is BLACK background with mostly
green text.

I can't find any mechanism for changing the colour of the cursor which is
always BLACK, when it needs to be green or white etc.

Any solutions would be greatly appreciated.
--
JD