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Thanks for asking.
1) All it should take is to create custom actions that send the 0-9 number keys. This will only work, however, if the TV window is currently the active window. It won't work if you're in the EPG window. It's only for this reason that these actions aren't yet shipping as part of RB.
2) There isn't really anything such as draft settings. You can, however, backup and restore your settings while Remote Buddy is not (important!) running. All relevant Remote Buddy prefs files are located at [home folder]/Library/Preferences/com.iospirit.*emote*uddy*.plist.
Best regards,
Felix Schwarz