[fpc-pascal] Installer (2.6.4 win32) and path issues

[Marco van de Voort]

In our previous episode, Tomas Hajny said:
> Are they?
> 
> Anyway - as far as I can see, the usual solution appearing with other
> programs on MS Windows is either defaulting new version to the directory
> used for the previous one and/or suggestion that you should uninstall the
> previous version before installing the new version and that you're on your
> own otherwise. ;-)
> 
> I guess that we can go beyond this by adding a more specific note about
> possibly necessary manual editing of the PATH variable if people decide to
> upgrade while keeping the previous version to the readme and FAQ...

A small diagnose application might be also worth the effort.