First things first... this forum is not used much... join over at
http://www.landroverworld.org/forums/index.php
Second... There sadly hasn't been a chip made that truly helps with a rover that stays consistent, I had a powerchip installed in my 97 Disco (required my ECU to be sent to them) and it worked great for a while, but money is better spent on a cam and putting in and electric fan to replace the engine driven fan.