On the internet there are several libraries with IR codes in standard HEX format. You can copy these codes there and paste them in the corresponding field of AV SOFT.
This is very convenient when certain codes can't be sent out by the remote control (e.g. discrete ON/OFF codes).
If you have a device with multiple internal sources, the codes for preset 0 – 9 are probably the same for all these sources. In that case you can just copy paste the recorded codes from one tab page to the other.