Firstly I'd like to say that the ICR is a joke, if you find out the oath that their scientists swear by...you'd understand.
Secondly, if anything, the fact that evolution has occured is not in debate amongst scientist anyone educated enough to study biology, without evolution, the bulk of biology wouldn't make sense.
However what is argued over is the mechanism by which evolution occurs, we know macroevolution has and evidence was shown in link from the other d00d, or
here if you want to see it again.
They're all scientifically valid and each one comes with how you can refute them, so then Mr Outdated Creationist, begin the refuting with scientifically accurate data.