You create a CCF (Classic Pronto)/PCF (Next Gen [NG] Pronto)/XCF (Pronto Professional) file with the codes and upload it to the appropriate Pronto Files section noting the equipment for the codes within.
At the bottom of each of the pages below, you will find an 'upload' link which will allow you to submit the file.
Here's an example Roku location for the Classic Pronto.
[Link: files.remotecentral.com]I started here.
[Link: files.remotecentral.com][Link: files.remotecentral.com]Then clicked Philips link
[Link: files.remotecentral.com]Then clicked Philips Pronto Classic Family
to end up here.
[Link: files.remotecentral.com]Next, I clicked Device Configurations
[Link: files.remotecentral.com]And finally landed at the link above by clicking Roku.