AH me thinks i relise where i went wrong i thought that a long press of one button on the pioneer remote could be mapped to produce a short press of an original button on the rio remote.

Sure you can. A long press on the Pioneer can be mapped to a short press on the Rio. However there is one button on my Pioneer (CD-SR77 steering wheel remote) that doesn't play nice, I think it's the "Func" button towards the bottom. It sends very odd codes. I use the "Audio" button (next to Func) as my source button and it works fine.

I haven't tested out using the "SRC" button as the source button, but I do know it supports long presses. I use press and hold of my SRC button to toggle standby and it works okay. I posted my config.ini awhile back in this forum.