I am under the impression that you can actually literally send a sysex P6 patch to an AS-1 and it will work. I could be wrong, but I believe they use the same sysex format. That said, there might need to be some conversion (e.g. the SoundTower editor might import P6 patches and convert them to AS-1) but I seem to recall (though I can't find it now) someone (from DSI?) saying it was directly compatible, without conversion.
[Edit: There is an AS-1 forum section here. You might be better off posting there than here in the P6 section, since your question more correctly applies to the AS-1, not the P6.]