In fact, I use iw reg set JP all the time, so I modified every script loading drivers in my device to do it automatically. I've asked almost same question about Cleven, and Saturn pointed me to Cleven's script that control loading stock driers - it's just a matter of adding mentioned command there.

Of course, You need it only with stock drivers - bleeding-edge ones are already "unlocked" for all channels. As for power 30, hack You're referring to is only "theoretical" - available listed power is indeed seen as 30 (1000 mW!), but, obviously, it's also limited via driver. Not to mention, that I don't think hardware can handle 1000 mW.

/Estel