Lots of info here:
https://www.e90post.com/forums/showt...1317220&page=2
Short answer is you need to add +SPBR to the VO.
As far as coding goes, it's pretty simple. If you're brand new to coding, there is a little bit of a learning curve.
I've done it and I'm happy with the result (though I never drove it with the 335i brakes + no coding, so I can't compare the difference the coding made).