Nr-TTD is meant as an installer for TTD Patch, so you can download the zip into a empty folder, run install.bat, and end up with a ttdpatchw.exe that you can run and enjoy the full features of TTD Patch.
Currently (version 0.11), Nr-TTD does the following things:
- Download and extract TTD
- Download and extract TTD Patch
- Download and extract newgrf files, and add them to newgrfw.cfg
- Download and extract TTDPC
- Support for HTTP proxies, and able to find the IE settings from the registry
- Support for mirroring of the nr-ttd files
So hopefully this topic can raise awareness of nr-ttd and come up with some possible improvements or discussion

Possible future ideas (TODO) :
- Drag 'n Drop .zip or .grf files onto newgrf.bat to install them into newgrf/ and newgrfw.cfg