Thanks guys. But with the help of the plugin’s author Mattias, I was able to rewrite the script to suit my needs. All I had to do was change the line:
numtostring(Integer(tm%3600000/60000)+100, minutes, 0)
to:
numtostring(Integer(tm%7200000/60000)+100, minutes, 0)
Very simple to do and is free! Many thanks go out to Mattias.