The Zip includes only a loco.ace file, and the loco it shows doesn't have a zip in the download.
The Zip file contains a loco.ace to be used as an alternative to the one provided originally.
The Zip contains a loco.ace to be used for alternative colour schemes, see Tutorial #1 for usage.
The Zip contains a loco.ace that is a correction of the one originally supplied with the train.
The Zip includes correctional files.
The Zip contains a DOS Batch file.
The Zip is new.
The Zip's contents have been updated.