Oh, I did write the "copy only new files" utility that I was looking for. Here it is if anybody's interested.
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This saves a heap of time, especially copying huge folders over a network.
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John Larkin Highland Technology Inc
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jlarkin at highlandtechnology dot com
Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators