You can find instructions for doing this by going to support.philips.com and then navigating to your particular model Philips remote control.
where do i find all the codes for Philips universal cl032
ich bitte um codeliste von RC8500 dankedr.p.nepo@web.de
This remote is actually a US2-P63S. The manual is available through Philips. I have included the link to the web page on the Related links button on the left.