Software for the TSX NANO PLC

I have inherited 3 Modicon TSX Nano PLC that were put in operation about 13 years ago. This was contracted outside and no one has any information on the ladder or the software for these units. These were brand labled IDEC Micro3 units but the frimware is different so that the IDEC software will not work. Three units do the same operation a three separate locations so if I can find the software I can at least down load the ladder from one unit and then program the ladder in to another PLC. Any help appreciated
I have a pack containing TSX Nano PLC manual 1999, TSX PCU1030 dongle and drivers (Note: on floppy disk) Feel free to contact me by e-mail.

Tom, Thomas.Dineen [at] Pfizer [dot] com