Thank you very much for your reply.
I've found out that there are two different variations of ZF 8HP while browsing ebay for an m performance gear selector.
When I was trying to code paddle shifters to my car, I was told to code 2TB instead of 205 to make paddles work. However, the shifter still behaves like 205. I mean it's nothing like sport transmission (2TB)
I will give it a try with a sport automatic gear selector replacement, and then post the result here
Btw I gave a call to BMW reseller. They told me that sport transmission option is only available for engines higher than 2000cc