I've (only -

) just got around to trying out my USB ALDL interface cable as supplied by Geoff.
As I had a couple of minor issues (my fault - nothing to do with the interface or ElanScan), I think it only kind to share my findings!
1) The driver which is available on the Mountain Chips site didn't work (I believe that it is intended for use only with the Active Robots circuit board).
2) Downloading the latest driver from the FDTI Chip website worked just fine (
www.ftdichip.com/Drivers/VCP.htm)
3) Installing the interface and driver was a simple matter of unzipping the driver files from the download into a suitable location on the PC, plugging in the USB cable and telling Windows where to find the unzipped files. Screen shots of the process can be seen in the installation guides (found here:
www.ftdichip.com/Documents/InstallGuides.htm)
4) Remember to set the "Latency Timer" setting to 1ms in the Advanced Settings for the USB Serial Port in Device Manager (I didn't, then started to get worried, until I remembered!)
5) ElanScan won't be able to communicate with the ECU if the ignition is off or (probably) the immobiliser is active.
6) I think that ElanScan won't pick up changes to the USB serial port settings unless you close it, then run it again.
Ben