If you experience you console freezing from time to time when viewing from VMware vSphere client try to change video adapter drivers to
VMware SVGA 3D (Microsoft Corporation - WDDM).
Step by step:
1. Shut down your VM and edit it's video card settings to use at least 8MB (32MB recommended) of total video RAM.
2. Boot up VM login to the machine and open Device Manager. Expand Display Adapters and right click your video adapter (should be "VMware SVGA II") select "Update Driver Software".
3. Choose "Browse my computer for driver software" and navigate to C:\Program files\Common files\VMware\drivers\wdda_video. Complete the wizard and restart VM when promted.
install it on some test machine and then share "wdda_video" folder to access it from 2008 R2 machine. I don't know what effect it will have running video driver from 4.1 tools package on ESX server below version 4.1 so try it on your own risk.