Many people have some problems with vmware server on some 64bit operation systems.
If your server's ram is more than 6GB, you have to have a 64bit OS but I have tried to install vmware server on a 64bit server, it seems to be crashing my vmware server every 5 min and I cant use it more until I reset this service.
How about using esx? It's free and a much better product than server. It's very simple to learn. You would probably need to colocate rather than renting a dedicated server
Yes I know, it is better.
But I want to have CentOS, I am using vmware server on a quad server with 64bit centos. i have tried to use it on I7 cpu. It likes to be crash every times ( I am using vmware server on a I7 server with debian 64bit, and there is not problem )