The current version of MakeHex is at
[Link: john.fine.home.comcast.net]
NOT in the Pronto Files Section.

The text Lyndel put in post 6 of this thread is what he meant you to copy from there to a new file named Samsung.irp. That text looks like it would work, but I don't see any advantage to it over the NECx2.irp included in MakeHex.zip