Get an old PC (pentium I class or lower), install win3.1 or DOS, and try to
extract the data. Then, write the data to floppy, ZIP, or whatever, in some
more stable (i.e., non-Microsoft) format. If you need it, there are sveral
free file spliting/joing programs on the web. But, if each file < 1.44 Meg,
just use as many floppies as is require to do the move.
Or, try to link the old PC to a newer one via the parallel or serial ports.
There is moderately priced software that will do this for you, and it
usually comes with the special cross-over cable that you will need.
Or, get the data onto the hard drive of the old PC, then moev that hard
drive to a new PC, being careful to re-set the jumpers to "slave".
Good luck.