Thanks very much for all reply’s. Every answer helped me to get the DC-3 Inspection Car running and the TIU and remote upgraded. Being new to this MTH upgrade my experience was; phone cord from Wal Mart, Best Buy did not have, I had the mini stereo cable, local Radio Shack and Best Buy did not have 9 pin serial / USB cable. From Amazon.com I ordered Trendnet USB to serial converter, TU-S9, with CD-ROM driver - this was 2.0 and 3.0 compatible. I had downloaded only the MTH 5.0 and nothing for the upgrade worked. After downloading the additional newer level 6.10 everything came together and the upgrade was easy. Thanks again for all your reply’s and help, Richard
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