There are many many sites in the TTD community with New Graphics for download. I recommend the graphics forum at TT-forums
Installation
The Patch wiki has installation instructions but if you can't be bothered here is a guide. Most graphics are simple to install. In case you don't know, however, here is a step by step guide.
Instructions 1. Put your .GRF file in C:/yourttddirectoryhere/newgrf 2. Find the newgrf.cfg 3. Add /newgrf/yourgrffilenamehere.grf to a NEW LINE! 4. Fire up the patch and enjoy
