Hi,
a fixed position over a hotspot is not possible with the showtext() action.
See here the origin setting:
http://krpano.com/docu/xml/#textstyle
It only allows either a position related to the mouse cursor or to screen coordinates.
For showing a text over a hotspot, a textfield plugin element as children of the hotspot could be used, which will be shown and hidden via the onover/onout events of the hotspot itself.
Best regards,
Klaus