Using a hex editor, edit the ines binary. Search for the sequence "08 00 08 00". It should occur twice, a few bytes apart. After the second occurrence, you should find the sequence "74 2c". Change this to "75 2c". That should do it. (A change of 1 bit makes all the difference!)
Note that this hack reverses the sense of a check in the iNES code. This means that if the audio bug is ever fixed (or you try to run the hacked binary on a Linux system) the audio will not work.
This is known to work in the dynamically-linked ELF release of iNES, version 0.7 (08/02/1997). (sum 46458 194)