I just discovered a wonderful little program

[thegrindre]

Folks, I just found this little jewel of an app and it's free. It will make brick and tile textures for all your buildings seamless. It will do board textures for the sides of the buildings, also.
I'm just starting to use it myself and found it to be super great so far.
I'll post pics as I learn to master it although it is really easy to use.

http://www.3d-rekonstruktionen.de/BricksNTiles/

Don't forget this site for all your textures, too;

http://www.cgtextures.com/

Enjoy!

P.S. I want to commend the author of the 'Rail Mogul' logo. Fantastic piece of work!