Thanks for that! I used to use Laplink back in the old days - with a serial and a parallel cable, and as you say with the option to squirt the software down the cable to the second machine. I think I still have Laplink floppies and manual somewhere in the cupboard...
I didn't really want a $39 item - skinflint to the last, I've now taken to using the (freebie) USB pen drive (64MB) which seems to do the job.