Change orientation of dialer to Landscape mode

[susja]

hello
I'm using DroidX. When I use car dock application and click on dialer ( when it's in car mount ) the dialer is in Landscape mode which is OK.
Now I'm using another 'car dock' application i.e. Car Home Ultra which is way better then original car dock app. The problem is that it gives dialer only in Portrait mode.
My question: how could I modify 'dialer' to change to Landscape mode?
Thanks.