Hello G8tr, and welcome to the forum!!
I'm not familiar with your yourstick, but it might be necessary to go into your controller options ingame, and set your axis and buttons again, after this upgrade. A bit annoying, but there should be no reason to make a new profile in the game.
As far as the horn packs goes, that indeed also requires a new install, to overwrite the horns of the newly installed ships with the ones from the horn pack. I'm not 100% on the radio pack, but it could never hurt if you're at it anyway. They only take a few minutes and luckily the installers do all the work for you! You can revert to default or make a fresh install at any time, with the patch executables!
Sorry I haven't got an answer that will take less effort.
Welcome aboard, I hope you enjoy your stay!
Regards,
Fred