You can try ReWaRD before deciding whether to buy.
the Trial Edition on your computer:
the ReWaRD Setup Program
to a convenient folder on your
local computer (e.g. WINDOWS\TEMP)
the Trial Edition by choosing the Run... command on Windows' Start
Menu. Enter the path to the setup program in the Open field (e.g.
WINDOWS\TEMP\ReWaRD2xSetup.exe) and click OK
the instructions on screen
the Trial Edition by choosing Programs > Geocentrix >ReWaRD 2.7 from Windows' Start Menu
a full appreciation of ReWaRD, we recommend that you also download the
ReWaRD Quick-Start Guide and follow the Tutorials