Thank you for your assistance. The apps you recommended is brilliant. I got it right first time. Only used MakeHEX and IR tool. Still need to try the others out to see what they do. If you could forward the PCF file I would like to have a look at it. The only strange thing that I saw is that ProntoProEdit NG changes the HEX code after you saved it. But it still works so I'm not complaining.