Instead of Planner, why not try Organiser?
It has for the most part the same features as Planner, only it is much more
flexible in grouping tasks. It also has support for other items such as web/file
Windows XP, Windows 2000 or Windows NT4.0 (note that Windows
98 is NOT supported)
Pentium 3 or AMD (or higher)
processor running at 500Mhz or more.
Run the downloaded .exe file to install the program.