Well, I do not tell how to program it, because every radio and every tank board is different. Basically, you need a programable radio, and thats a radio with a screen and decent software, like the turnigy 9xr pro (which uses the wonderful ersky9x), or the taranis radios .which uses OpenTX which is almost the same as the ersky9x.

Second you have to take a look to your board specs. For example, if for shooting the barrel you need to send a signal of +100 in channel 4, you just need to program the radio for sending that values with any switch.

Multiply this with the tons of features that some boards has (like my ASP 2, with more than 200 hundred sounds) and after a while, is it done.

About how to program your radio... As I said, I dont know which radio you are using, but I suggest you to try looking for a manual in internet, or a video tutorial in youtube. But if you have a question you can contact me anytime here or with private message and I'll try to help you the best as I can.

Tamiya electronics are REALLY easy to program just because the huge lack of functions they have. But if you managed to program your radio switches for triggering the functions in your tamiya electronics, with the clark or any aftermarket board is no different. Again, just take a look to your tank board instructions. I wish I could help you more, but Im not using Clark stuff for quite a long time.