[CentOS-virt] Vmware Server 2 and KVM....

I am finally starting to pull the plug on vmware 2 and want to start migrating to KVM, what I would like to know and I have searched but not found anything conclusive. Is it possible to run Vmware server 2 and KVM at the same time, I am running Centos 5.5 x64 on a 16 core 32g memory machine....the reason I would like to do this is that it would allow me to convert the vm's one at a time and do it in more of a phased approach, otherwise I may have to try to do it all at the same time....I dont have many VM's maybe 6 or 7 but would be nice if I could do them one at a time....Thanks in advance.... :)