For the Lenz, you will have to purchase one of their two computer interfaces for the thick end of £100. I would go for the USB version on the grounds that serial ports are finally starting to disappear from new PCs. The interface ships with a piece of software which behaves as a controller. I don't know if there are "hooks" into the software that you can use to monitor what the controller is telling the loco to do so that you can record the mileage.
If you want greater control then you are looking at something like the "Train Controller" software from http://www.freiwald.com/ This is an all singing all dancing system. It ain't cheap either. One of our members The Volebender General has an unanswered query on this stuff, so there's not many of us here using this stuff - yet. One fan is Steve Jones of www.electricnose.co.uk. He has written some informative articles on it.
Lenz is not the only solution, but it is the one I have researched most fully.
The forthcoming Hornby system appears to have a PC interface built in as standard but when software for this will become available is anybody's guess. The fact that Hornby can build in the PC interface and sell the whole unit for little more than Lenz sell the PC interface on its own illustrate the cost benefits of using the latest integrated technology. The Lenz PC interface probably needs almost as many parts as the complete Hornby interface.
A forum community dedicated to Model train and railway owners and enthusiasts. Come join the discussion about collections, displays, models, styles, scales, motors, reviews, accessories, classifieds, and more!