how do I put the code in Blaupunkt

My son did not use his car for a few months .Battery dead.Code gone.
We have the code but do not know how to install it .
Any help much appreciated.
Blaupunkt radio /tape player in a Renault Laguna.

thanks
Alan

try here
h**p://www.dndservices.co.uk/htmls/flash_htmls/flash_decode2.htm