Hello
Could you explain me how to do Pop and Bang mode on MED9

thanks

Set CWSAWE to 1 (should be 0 stock)
play around with KFTVSA
Raise RPMs in KFNWEGM (imo just use KFTVSA should be enough)

This should be enough for acceptable pops/gargles.

If you really wanna do crazy bangs do the above +:
KFZWMN - reduce the 2 low load rows to -20 or -30 (this generally good for pops&bangs on shifting in the higher revs)
KFZWOP and KFZWOP2 reduce -10 from the low load areas (or more depending on how crazy you wanna go)

Also sound depends on your exhaust setup too.

Theres  no surefire way, experiment with the above, particularly KFTVSA to get it sounding how you like.. And ofcourse intensity can be adjusted using KFZWOP/2

But yeah theres another proper thread here that can help you better. Some guys even posted videos there: http://nefariousmotorsports.com/forum/index.php?topic=7174.0

Enjoy