Do not show icons for apps runnin on VM

I am curious if there is an option in Parallels desktop 4.0 to not show the icons for each app running on the virtual machine in the doc. I have two monitors and run the VM on one monitor by itself , but in the doc of my main display it shows all the icons of any app that is running on the virutal machine and it starts to get very cluttered. Is there anyway to turn that off so it does not show those icons in the dock.