custom cursor in painter

hi,

i have a problem with painter 9.1

i paint little most grey pictures and the cursors like torus and triangle...are to big. the single pixel cursor is because of the grey background invisible.

my question:
i there a way to custom individually the cursor? i know i cant do i within the painter software but is there some other trick or patch to change the original cursors to own one. with hex editors or sth. like that.

thanks

edit: making the single-pixel-cursor BLACK, instead of 50%-grey, would be great too!