I've also posted the schedule in the exhibition tournaments thread now...
I believe very much that the other group would have been better for Kiwi... if Haas and Kiefer changed their groups, it would be better for Kiwi because both, Schalken and Melzer, looks like if they suit Kiwi perfectly and he never had many troubles beating them, and so far, he is a 7-0
matches and 15-2
sets against them
Another note is that Kiwi has beaten Melzer an additional time not listed in the ATP databases, two years ago in St. Anton, 6-2 6-4, rather easily in just above one hour.
Against Koubek and Berdych there are no meetings yet, so don't have any references to the past. Especially the 0-0 H2H with Koubek is very surprising... these two guys are for very long time on the tour, but never played an official match against each other!
Another note not concerning Kiefer vs Koubek is that Koubek has beaten Kiwi two years ago in the final, 3-6 5-7. Koubek has so won the event already two times, also beating Roger Federer 6-4 6-1 in 2002.
Koubek is dangerous there, in a group with just three people, two opponents, you should better win both of your matches to have a chance for the final...