To use MakeHex, you need to know the protocol and device and subdevice numbers for the signals you want.

If you post a sample of Pronto hex for that device, any expert here could use the IrTool program and decodeir.dll to find that info.

I don't know whether LG CRT TV's are consistent enough across models for us to get the same info without the Pronto Hex sample. I don't have my data on such things handy at the moment.