3 button key head work on 2000 S?

[humara]

I'm working on sourcing a replacement head for my dead 2nd key.
1st, I'm assuming from some renntech posts that i can take the blade out and put it in the new head.
2nd, I'm assuming that i can't buy a used head unless it has the tag that porsche requires for reprogramming.
3rd, since i have to spend the money, i might as well see if its something i can upgrade in the process. i've noticed the newer boxsters (not 987) have a slightly different design with the front trunk and rear trunk buttons.

Are these assumptions correct? And can i buy the 3 button key head?

thanks