I follow this tutorial (http://www.linux-kvm.com/content/using-vmware-vga-kvm-windows-guests) to use Vmware VGA with KVM Windows Guests.
The vmware vga driver is installed on Windows, but I can't select "vmvga" into Proxmox's interface. I can just choose "default", "Standard VGA" and "Cirrus Logic GD5446".
I tried command "kvm" and "qm" but nothing.
Looking at a Proxmox forum post and info on vmware vga setting in KVM: you might try editing your conf file for the machine, e.g. /etc/qemu-server/101.conf, and add a line
args: -vga vmware