AIFF contains raw uncompressed audio data with an IFF header in the beginning. So if nothing else helps, processing it as raw data shouldn't be a problem (with a little clicking noise at the beginning).
IIRC there was a program on Aminet which overwrites the AIFF header with a WAV header so that PC programs recognise it as WAV.
However, AIFF is a very common format. PC programs should be able to read it. For example WinAMP should be able to play .AIF files. Just rename it into something.AIF and see what the PC does on a double click.
Bye,
Thomas
