JP1 Remotes

I have succeeded at making a file that incorperates the main subdevices of 3 mega changers and one secondary subdevice using the original sony12/15/20 protocol. This gave complete control of one and partial control of 2 other megachangers in one remote. But i would love to succesfully modify this ...

Thank you so much for your fast response and your advice. I have looked at the page of Sony Codes several times already. but when you sent me back to it, reviewed it with remote master comands screen next to it and compared what info goes where. I am slow with this so please bear with me. I figured ...

1. Device: sony dvp-cx777
2. Type of device: DVD mega changer
3. Year: 2005?
4. JP1/UEI Remote model: Slingbox
5. Do you have a JP1 cable? No
6. Still have original remote? Yes
7. Checked the file section? Yes
8. Checked Pronto file section (at R/C)? Yes and i have downloaded a pcf file, but do ...