Hi Guys,
KN7000 can load KN2000, KN3000, KN1400, KN1500, KN5000, KN6000 and KN6500. This applies to Composer, Sequencer, Panel Memory, Sound Memory and Pads.
In order to load KN1000 files you would load them into a KN2000 or KN3000, then save them as KN2000 or KN3000 files... and then load the resulting converted files into KN7000.
This is my interpretation from the manuals I haven't tried it myself but I think John Dawson can confirm because I believe that he's carried out this process (he's offline for a few days).
Best wishes,
Mike