Gopher software is the way to go, it is americanised but it does have metric options you just have to change the options. It's not 100% but it is the closes thing to a good software package for our business. I would recommend that you download a trial version of Gopher Pro if you have staff or spray chemical or Gopher Plus for the rest of you. Basic is very basic but if you are looking for replacement for Mowability or a better version of MY MOW then Gopher is the one to get.
link http://www.gophersoftware.com/
DavidS