Following up, just got my M3 back from Euro delivery and loving the car!
Ordered the pedal covers and the steptronic sized brake pedal and getting ready to install. Just thought I'd check one more time to see if anyone has installed the steptronic pedal in a DCT car or if anyone has any pointers to removing the plastic under the dash to access the pedal. I've removed this panel in my 335, so I assume its similar but any tips are appreciated. I'll take pics and post them up.