I think I understand what you are saying. I looked at the translater again from Yamaha and this is what it states:

Enter a NEC IR code like:
7F 4A (normal NEC IR code )

7F01 4A (16bit custom NEC IR code - used in MusicCAST, MCX-2000 and some of the new AV Receivers)

7F01 4A33 (32 bit nec code - currently not used in Yamaha products)

7F014A33 (32 bit nec code - currently not used in Yamaha products)

NEC IR CODE

Press generate button and the generated code will be copied to clipboard.

Generated Pronto IR HEX;

I have looked at the make hex program and already downloaded it but I couldn't figure out which of the numerous codes I would generally use, and how to make the .irp files? The AA 1A is Pioneer's discrete off for a PDP-6010FD.

What I am looking for is a better understanding of how to generate hex codes on my own and how to translate the IR information available on Yamaha, Pioneer and other vendors websites.