After a tile has been created it appears the ortho texture files are kept in two places inside the Ortho4xp folder: a folder called orthophotos and also within in the tiles folder.  For sake of hard drive space, once the tile has been created, can I then delete the large texture files from the orthophotos folder?  The scenery folders within the tiles folder are what is linked to custom scenery so I would presume you could unless I am missing something.

The orthophotos folder contains the jpegs used during generation and can be safely deleted once the tile has been completely generated. The only reason you would want to keep this folder is if you want to regenerate the tile in the future using different colour settings.

Thanks!